Thanks Nick14,
Yes you could get the IMC signed off and extended for 25 months pre- EASA but can't see the info in 804. I have had it done 3 times already.
I do get your point though that I can just do it in a single, but why pay more money when it's been possible to get a tick in the box for free under JAA. I'll cal the CAA, again, and try clarify.
Anyway thanks for your help.
gb