renewal
mine lapsed 2 years ago and checked with 2 flight schools and the CAA and it seems now that you have to renew it in an a/c. If it hadnt lapsed then the rule is that it can renewed on a sim only alternately with a/c each year.
As for the multi, I had to do a uk multi when I converted because my kiwi had been done over a year before, if you are current on it at present it might count as ok for the jaa but not sure on that. Either way, you will have to do the jaa in an aircraft and you will do the multi at the same time as I am doing this week.