In order to help me settle a bet can someone in the know please tell me if when arriving on a domestic BD flight and connecting to a VS flight at LHR, do you go landside, on arrival at terminal one and walk across to T3 or do you stay airside and connect as a connecting passenger? Both flights are on the same PNR!
According to the BAA website you can stay 'airside' by following the flight connections signs (sorry link to it is too long to post and dont know how to shorten it !)
However, I don't think this is compulsory and you can go the landside route if you want to ! If you have not checked through your luggage you will have to do this anyway !