What are the logistical problems of not picking up luggage from an International flight at Heathrow terminal 5 for several hours and taking a short ride to Manchester and back. The idea is not to have checked luggage in Manchester to make it easier to come back from Manchester hand baggage only and not having to go to check-in counter - just in case the interval between the Manchester flights are shortened by delays and cancellations. Can one access the international carousels on return from Manchester? This is all supposing that the international luggage can be short-checked to London.