FORM - 2 ORIGINAL 489-MUMNP-2005 THE PATENTS ACT, 1970 (39 of 1970) & The Patents Rules, 2003 COMPLETE SPECIFICATION (See Section 10 and Rule 13) LAUNDRY TREATMENT COMPOSITIONS AND COMPONENTS THEREFOR HINDUSTAN LEVER LIMITED, a company incorporated under the Indian Companies Act, 1913 and having its registered office at Hindustan Lever House, 165/166, Backbay Reclamation, Mumbai -400 020, Maharashtra, India The following specification particularly describes the invention and the manner in which it is to be performed. GRANTED 17-05-2006 WO 2004/050814 C4264(C)COM LAUNDRY TREATMENT COMPOSITIONS AND COMPONENTS THEREFOR Technical Field The present invention relates to compositions for softening textile fabrics and which also contain a perfume and a deposition aid.. Background of the Invention Silicones of various structures are well known as ingredients of rinse conditioners to endow softness to fabrics. WO 03/015736 discloses an aqueous skin-care, hair-care or fabric-care composition which comprises a surfactant, a silicone which is insoluble in water, and a perfume having a solubility parameter not exceeding about 20. The composition preferably includes a deposition aid, e.g. a cationic deposition aid, to enhance deposition. One preferred class of materials is cationic guar gum derivatives such as guar hydroxypropyltriammonium chloride (which is commercially available from Rhodia under the Trade Mark Jaguar). Particularly preferred is Jaguar C13S, which has a low degree of substitution of the cationic groups and high viscosity, and this is the only compound identified as a deposition aid in the specific examples of WO 03/015736. WO 02/18528 discloses systems, compositions and methods for domestic laundering comprising selected cationic silicone polymers formulated for improved fabric care. In a preferred method for preparing the compositions, it is revealed that the cationic silicone polymer may be mixed with fabric substantive perfume ingredients to form a cationic silicone polymer premix. Our UK patent application no. 0121148.1, unpublished at the priority date of this invention, describes and claims a substituted S-w linked polysaccharide having covalently bonded on the polysaccharide moiety thereof, at least one deposition enhancing group which undergoes a chemical change in water at a use temperature to WO 2004/050814 PCT/EP2003/013805 C4264(C)COM increase the affinity of the substituted polysaccharide to a substrate, the substituted polysaccharide further comprising one or more independently selected silicone chains. The polysaccharide acts as a vehicle to deposit the silicone chains bound to it, onto the fabric, from a wash liquor. Further, our UK patent application no. 0123380.8, also unpublished at the priority date of this invention also discloses that such substituted polysaccharides can be incorporated in compositions containing a silicone perse to enhance deposition of the free silicone. When a silicone is delivered as a fabric softening agent in a fabric conditioner in the rinse cycle, consumers greatly appreciate the deposition of a perfume from the fabric conditioner as this, gives a pleasing sensation in combination with the resultant softness and smooth feel of the fabric. However, in principle, a silicone does not strictly have to be dosed from a fabric conditioner in the rinse cycle and could for example be delivered in a main wash product This reduces the amount of perfume which would be carried through to the dried fabric after rinsing and drying. However, we have now discovered that this problem may be overcome by incorporating a perfume component into the silicone. This is especially (but not exclusively) beneficial when the silicone is delivered to the fabric using a deposition aid such as the substituted polysaccharide referred to above, which is primarily intended to deliver a softening benefit from silicone materials in the wash. Definition of the Invention A first aspect of the present invention provides a composition (e.g. a chemical composition or a laundry treatment composition) comprising a silicone and a deposition aid, for example a substituted polysaccharide comprising p M linkages having covalently bonded on the polysaccharide moiety thereof, at least one deposition enhancing group which undergoes a chemical change in water at a use temperature to increase the affinity of the substituted polysaccharide to a substrate, the substituted polysaccharide further comprising one or more independently selected silicone chains, the composition further comprising a perfume component dissolved or dispersed in the silicone. WO 2004/050814 PCT/EP2003/013805 C4264(C)COM A second aspect of the present invention provides a method for depositing a silicone onto a substrate, the method comprising, contacting in an aqueous medium, the substrate and a composition according to the first aspect of the invention. A third aspect of the invention provides the use of a composition according to the first aspect of the invention to enhance the softening benefit of a laundry treatment composition on a substrate. Detailed Description of the Invention THE SILICONE As used herein reference to a silicone in which a perfume component is dispersed or dissolved therein includes both a single liquid silicone compound or a mixture of two or more different liquid silicone compounds. Silicones are conventionally incorporated in laundry treatment (e.g. wash or rinse) compositions to endow antifoam, fabric softening, ease of ironing, anti-crease and other benefits. Any type of silicone can be used to impart the lubricating property of the present invention however, some silicones and mixtures of silicones are more preferred. Typical inclusion levels are from 0.01% to 25%, preferably from 0.1% to 5% of silicone by weight of the total composition. Suitable silicones include: - non-volatile silicone fluids, such as poly(di)alkyl siloxanes, especially polydimethyl siloxanes and carboxylated or ethoxylated varients. They may be branched, partially cross-linked or preferably linear. - aminosilicones, comprising any organosilicone having amine functionality for example as disclosed in EP-A-459 821, EP-A-459 822 and WO 02/29152. They may be branched, partially cross-linked or preferably linear. WO 2004/050814 PCT/EP2003/013805 C4264(C)COM . - any organosilicone of formula H-SXC where SXC is any such group hereinafter defined, and derivatives thereof. -reactive silicones and phenyl silicones The choice of molecular weight of the silicones is mainly determined by processability factors. However, the molecular weight of silicones is usually indicated by reference to the viscosity of the material. Preferably, the silicones are liquid and typically have a viscosity in the range 20 mPas to 300,000 mPas. Suitable silicones include dimethyl, methyl (aminoethylaminoisobutyl) siloxane, typically having a viscosity of from 100 mPas to 200 mPas with an average amine content of ca. 2mol% and, for example, Rhodorsil Oil 21645, Rhodorsil Oil Extrasoft and Wacker Finish 1300. These viscosities are typically measured at 21 s'1, as are other viscosities referred to herein, unless specifically indicated to the contrary. In general, however, it is preferred to use a silicone oil or mixture of silicone oils with a low viscosity, eg in the range of from 200 to 5,500 mPas, for example from 200 to 5,000 mPas. This makes the silicone easier to emulsify and also facilitates penetration of the silicone part of the substituted polysaccharide to penetrate into the silicone droplets in the emulsion. For example, where a silicone has a viscosity above 5,000 mPas or above 5,500 mPas, it is preferred to incorporate some of a more volatile or low viscosity silicone, such as DC245 ex Dow Coming. This volatile or low viscosity silicone.does not have to be one which endows a softening benefit. A typical result of such incorporation is as follows. Commercial Silicone Wt% DC245 Viscosity mPas 100 0 6,127 91 9 4,176 80 20 2,726 66 34 1,181 50 50 502 34 66 223 WO 2004/050814 PCT/EP2003/013805 C4264(C)COM The amount of low viscosity/volatile silicone, especially a non-softening silicone, is preferably from 5% to 40%, more preferably from 10% to 30% by weight of the total silicone. More specifically, materials such as polyalkyl or polyaryl silicones with the following structure can be used ; The alkyl or aryl groups substituted on the siloxane chain (R) or at the ends of the siloxane chains (A) can have any structure as long as the resulting silicones remain fluid at room temperature. R preferably represents a phenyl, a hydroxy, an alkyl or an aryl group. The two R groups on the silicone atom can represent the same group or different groups. More preferably, the two R groups represent the same group preferably, a methyl, an ethyl, a propyl, a phenyl or a hydroxy group, "q" is preferably an integer from about 7 to about 8,000. "A" represents groups which block the ends of the silicone chains. Suitable A groups include hydrogen, methyl, methoxy, ethoxy, hydroxy, propoxy, and aryloxy. Preferred alkylsiloxanes include polydimethyl siloxanes having a viscosity of greater than about 10,000 centistokes (est) at 250C; and a most preferred silicone is a reactive silicone, i.e. where A is an OH group. Suitable methods for preparing these silicone materials are disclosed in US-A-2,826,551 and US-A-3,964,500. Other useful silicone materials include materials of the formula: WO 2004/050814 PCT/EP2003/013805 C4264(C)COM. wherein x and y are integers which depend on the molecular weight of the silicone, the viscosity being from about 10,000 (est) to about 500,000 (est) at 25°C. This material is also known as "amodimethicone". Other silicone materials which can be used, correspond to the formulae: wherein G is selected from the group consisting of hydrogen, phenyl, OH, and/or Ci^ alkyl; a denotes 0 or an integer from 1 to 3; b denotes 0 or 1; the sum of n + m is a number from 1 to about 2,000; R1 is a monovalent radical of formula CpH2pL in which p is an integer from 2 to 8 and L is selected from the group consisting of wherein each R2 is chosen from the group consisting of hydrogen, phenyl, benzyl, a saturated hydrocarbon radical, and each A" denotes a compatible anion, e.g. a halide ion; and WO 2004/050814 C4264(C)COM PCT/EP2003/013805 wherein R3 denotes a long chain alkyl group; and f denotes an integer of at least about 2. Another silicone material which can be used, has the formula: wherein n and m are the same as before. Other suitable silicones comprise linear, cyclic, or three-dimensional polyorganosiloxanes of formula (I) wherein (1) the symbols Z are identical or different, represent R1, and/or V; WO 2004/050814 PCT/EP2003/013805 C4264(C)COM (2) R1, Rzand R3 are identical or different and represent a monovalent hydrocarbon radical chosen from the linear or branched aikyl radicals having 1 to 4 carbon atoms, the linear or branched alkoxy radicals having 1 to 4 carbon atoms, a phenyl radical, preferably a hydroxy radical, an ethoxy radical, a methoxy radical or a methyl radical; and (3) the symbols V represent a group of sterically hindered piperidinyl functions chosen from - R4 is a divalent hydrocarbon radical chosen from - linear or branched alkylene radical, having 2 to 18 carbon atoms; - linear or branched alkylene-carbonyl radical where the alkylene part is linear or branched, comprising 2 to 20 carbon atoms; WO 2004/050814 PCT/EP2003/013805 C4264(C)COM - linear or branched alkylene-cycolhexylene where the alkylene part is linear or branched, comprising 2 to 12 carbon atoms and the cyclohexylene comprises an OH group and possibly 1 or 2 alkyl radicals having 1 to 4 carbon atoms; - the radicals of the formula -R7-0-R7 where the R7 radical is identical or different represents an alkylene radical having 1 to 12 carbon atoms; - the radicals of the formula -R7-0-R7 where the R7 radical is as indicated previously and one or both are substituted by one or two OH groups; - the radicals of the formula -R7-COO-R7 where the -R7 radicals are as indicated previously; - the radicals of formula R8 -0-R9-0-CO-R8 where the R8 and R9 radicals are identical or different, represent alkylene radicals and have 2 to 12 carbon atoms and the radical R9 is possibly substituted with a hydroxyl radical; - U represents -O- or -NR10-, R10 is a radical chosen from a hydrogen atom, a linear or branched alkyl radical comprising 1 to 6 carbon atoms and a divalent radical of the formula: where R4 is as indicated previously, Rs and R6 have the meaning indicated below et R11 represents a divalent alkylene radical, linear or branched, having 1 to 12 carbon atoms, one of the valent bonds (one of R11) is connnected to an atom of-NR10-, the other (one of R4) is connected to a silicone atom; -the radical R5 is identical or different, chosen from the linear or branched alkyl radicals having 1 to 3 carbon atoms and the phenyl radical; -the radical R6 represents a hydrogen radical or the R5 radical or O. WO 2004/050814 PCT/EP2003/013805 C4264(C)COM For the groups of formula (III): R'4 is chosen from a trivalent radical of the formula: where m represents a number between 2 and 20, and a trivalent radical of the formula: where p represents a number between 2 and 20; - U represents -O- or NR12, R12 is a radical chosen from a hydrogen atom, a linear or branched alkyl radical comprising 1 to 6 carbon atoms; - R6 and R6 have the same meaning as proposed for formula (II); and (4) - the number of units nSi without group V comprises between 10 and 450 - the number of units nSi with group V comprises between 1 and 5, - 0