Just booked a cracking deal in the BA flash sale for next Sept but in my haste to book I'm now doubting whether I've left enough time to comfortably transfer from Terminal 5 to Terminal 3.
Does anyone have any experience of doing something similar in approx. the same 2 hour timescale? Will we need to go through security again in Heathrow? Is this doable on the basis the flights will be running on time? HELP??? Not sure how BA would view amending my booking to an earlier flight from Glasgow or whether I would be subject to a ridiculous fee to change.
Any help would be greatly appreciated. TIA