Well all seems to be as clear as mud on this one! I'd appreciate some further input and clarity if anyone can provide it.
As portsharbourflyer pointed out, CAP 804 states that one needs to hold a multi-engine IR(A) in order to apply to add a multi-pilot rating, but like him I'm confused as to the difference, if there is one, between holding an IR and it being current.
A couple of times in the past I've both revalidated and added ratings without a current IR, but these new EASA rules may have ruled out that privilege. I see no reason whatsoever for an IR to be current when starting a new rating as it is done as part of the LST.
Clarity anyone?........please.