Thanks for all the replies and advice. I've done some further digging around on websites and made a few phone calls. It seems I may have a problem medical wise.
A couple of years ago I failed my class 1 medical on the audiogram. Only marginally and it's nothing serious (I had no idea there was anything wrong until the medical) but enough to fail the stringent Class 1 standards and enough to curtail my wannabe thoughts. Officially adding an IR to a PPL only needs a Class 2 but I read yesterday on the CAA website that an extra audiogram is needed too !
Does anyone know whether the audiogram is carried out to the same standards as the Class 1 medical ? If so, I'm stuffed ! (for a JAA IR at least).
Hampstead