Advising a person is a specified kind of activity if the advice -
(a) is given to the person in his capacity as a home purchaser or potential home purchaser; and
(b) is advice on the merits of his doing either of the following -
(i) entering into a particular regulated home purchase plan, or
(ii) varying the terms of a regulated home purchase plan, entered into on or after 6th April 2007 by him, in such a way as to vary his obligations under that plan.