Originally Posted by
Non-NonRev
To the OP - you might note the folowing information posted by well-informed BA Forum member Smirnoff:
A search over in the BA forum will turn up additional postings, including some that refer to the inability to leave baggage in the Galleries check rooms.
An alternate strategy would be to clear immigration in T3, have your shower and breakfast in AA Arrivals, check your bag at Left Luggage, then go into the center city. When returning to T3 to claim you bag, you would then take the HEX (no charge) from T1-2-3 to T5.
Your T3 suggestion and baggage storage idea is the more dependable one to go with. [I heard a horror story about trying to wait to be released two weeks ago.]
There's one alternative -- don't know how reliable it still is and I think it's mentioned in the same thread where you pulled that quote -- and that is to use the airside T5 train and try to stay on until it gets you to the T5 arrivals area and opens the doors facing the other way.