There used to be an argument that a different basis of valuing
the benefit should be used if a cash alternative to a van were
offered (even if it were not taken).
This is no longer the case. Section 119 ITEPA 2003 makes it
clear that the mere fact that a cash alternative is offered does
not change the method of calculation of the cash equivalent of the
van benefit. It applies to all vans from 2005/06 onwards (it
previously applied only to cars).