Thank you for the helpful replies, it puts my mind at rest!
I intend to maintain my UK issued CPL, and so presumably I will not need to re-do my medical in Malta if the flying school do not mention it.
This also means that I will need an examiner designated by the UK CAA, thankfully (according to BillieBob's list) it seems that there are a couple based in Malta. Any idea how I may go about contacting either of them in order to double check everything?
I will be training for a ME/IR, I understand that this is minimum 45 hours if I already have a CPL. OhNoCB, are you saying that there is no specific requirements in terms of the time split between sim and aircraft? As mentioned, the Maltese-based/Belgian approved school is suggesting 35 hours sim time and 10 hours on the DA-42, whereas most schools I've seen in the UK have at least 15 hours on the DA-42.