“30. There is a single supply in particular in cases where one or more elements are to be regarded as constituting the principal service, whilst one or more elements are to be regarded, by contrast, as ancillary services which share the tax treatment of the principal service. A service must be regarded as ancillary to a principal service if it does not constitute for customers an aim in itself, but a means of better enjoying the principal service supplied (C & E Commrs v Madgett (t/a Howden Court Hotel) (Joined Cases C-308/96 and C-94/97) [1998] BVC 458 , para. 24). 31. In those circumstances, the fact that a single price is charged is not decisive. Admittedly, if the service provided to customers consists of several elements for a single price, the single price may suggest that there is a single service. However, notwithstanding the single price, if circumstances such as those described in para. 7 to 10 above indicated that the customers intended to purchase two distinct services, namely an insurance supply and a card registration service, then it would be necessary to identify the part of the single price which related to the insurance supply, which would remain exempt in any event.”
“…where two or more elements or acts supplied by the taxable person to the customer, being a typical consumer, are so closely linked that they form, objectively, a single, indivisible economic supply, which it would be artificial to split”
"... as a general rule, a leasing service and the supply of insurance for the leased item cannot be regarded as being so closely linked that they form a single transaction. The fact of assessing such supplies separately cannot constitute in itself an artificial splitting of a single financial transaction, capable of distorting the functioning of the VAT system."