Just want to check with others before calling - I should be able to coupon-upgrade a ticket where the first leg is in B class (GOLIGHT) and the second is in P, right?
I could book the second leg in S for an extra GBP 46, but there is no business cabin on that flight anyway.
Based on recent posts, I will have to be waitlisted since there is no availability but there is a good chance of getting upgraded in the end.