I spoke with an old chum at the Belgrano today, who provided me with the relevant weblink. See
http://www.caa.co.uk/docs/224/srg_ga...%20revised.pdf
Here is the amended requirement:
Scale KK
(i) A survival emergency locator transmitter capable of operating in accordance with the relevant provisions of ICAO Annex 10, Volume III and transmitting on 121.5 MHz and 406 MHz;
(ii) An automatic emergency locator transmitter capable of operating in accordance with the relevant provisions of ICAO Annex 10, Volume III and transmitting on 121.5 MHz and 406 MHz;
The McMurdo FastFind Plus would thus seem to meet the requirement. I will try to obtain confirmation of this.
Without an ELT, the 10 min 90 KIAS sectors for the south UK are:
So, to avoid the Golf Alfa Lunch At Letookay rat run, £480-ish for an ELT(S) isn't too bad. If my information is correct, I will probably buy one and hire it out as required to club members for a deposit and nominal fee.