Not 100% sure on this one.
Most likely Macroglossum variegatum, though there are several other possibilities. Will follow up with a couple of specialists, but if a ventral shot were available, this would make life a little easier. A specimen would settle the issue, but I don't condone taking [i.e. a voucher specimen] every individual Macroglossum to find out what species it is, even if it's a difficult group and one has a collecting permit from AFCD!