We are flying into Heathrow and then thinking of flying to Belfast, renting a car, touring northern ireland and then the republic, bringing the car back to Belfast, taking the ferry to Straner and meeting up with son for a week of golf in Scotland. Does this sound right? Where would be the best place to rent a car? at the airport? or by the ferry port? We are thinking of flying either Aer Lingus or BMI....any preferences? We could also rent a car at Heathrow and take a long driving trip and ferry car across into Ireland and then back to Scotland then back to London....any and all suggestions welcome.