Originally Posted by Wyler
3. Coming back, can I check my bags from Oman straight through to Newcastle or do I have to pick them up at LHR, as that is the point of entry into the UK?
I can speculate about the other two, but here is the answer to this one: You do not have to collect and re-check at LHR, so they can be through-checked to NCL. Your checked bags will technically clear Customs at NCL, although you will clear immigration at the Flight Connections Centre at LHR (and, technically, your cabin baggage clears customs at this point).