Lavatory treatment device

A lavatory dispensing device comprising a lavatory treatment composition which comprises:

• up to 50% wt. of an adhesion promoter constituent based on a fatty alcohol polyglycol ether as may be represented by the following structural formula (I):
• R—OCH2—CH2—OnH (I)
• within which, R is an C12-C24 aliphatic mono- or poly-alkene moiety, and n has a value of from 1 to 50;
• 1-25% wt. of an organic solvent constituent, which is liquid at room temperature (20° C.);
• 0.5-25% wt. of at least one detersive surfactant constituent which includes at least one cationic detersive surfactant of formula (a):
• in which:
• R is C8-C22 alkyl;
• R1, R2, R3 and R4 are independently selected from the group consisting of:
• H, and the further group,
• in which R13 is C8-C22 alkyl with the proviso that R1, R2, R3 and R4 are not all H;
• and X is a halogen, preferably Cl, Br or I,
• in which:
• R is C8-C22 alkyl;
• R5, R6, R7, R8, R9, R10 and R11 are independently selected from the group consisting of:
• H, and the further group,
• in which R13 is C8-C22 alkyl, with the proviso that R5, R6, R7, R8, R9, R10 and R11 are not all H;
• and X is a halogen, preferably Cl, Br or I
• to 100% wt. of water;
• optionally a co-adhesion promoter constituent;
• and, further optionally one or more further optional constituents which may impart a further aesthetic or technical benefit to the said lavatory treatment compositions.