Originally Posted by
paulieuk
During the 3+ hour connection at T5 go to baggage services in the baggage hall (or customer service at connections or airside departures or FLounge) and request for the bags to be retrieved and returned to us in London, but then take the flight to DUB
Yes it may work, but it's fraught with potential problems, too many things could go wrong as soon as you get registered with Ready To Fly after requesting your bag. It may end up in Dublin after all.
I have to say that if you are doing this level of complexity you really need to be Hand Baggage Only. Or add more time to the connection.