See CAP 804 Part I Section 4 Part H, Subpart 1 Pages 5-6:
FCL.740 refers to validity and renewal of class and type ratings and FCL.740.A refers to revalidation of class and type ratings - aeroplanes. Para (b) of the latter refers to revalidation of single-pilot single-engine class ratings.
CAP 804 Part I Section 4 Part H, Subpart 1 Page 7 describes the UK alternative means of compliance for the training flight requirement:
UK Alternative Means of Compliance with FCL.740.A(b)(1)(ii) – Revalidation of single-engine class ratings.
The requirements for a training flight with an FI or CRI, referred to in FCL.740.A(b)(1)(ii), may be satisfied by receiving instruction totalling at least 1 hour from the same instructor in the course of a maximum of three flights.
Prop swinger, your copy of CAP 804 is out of date. The current version was released at the beginning of February 2013 and may be downloaded at
http://www.caa.co.uk/docs/33/CAP804Jan2013.pdf .