FDOS_UK August 30, 12:02
1. BA may not short-check your bag to London, so you would have to inform the staff and wait at Heathrow to retrieve it – this could take an hour or two. 2. BA may do nothing for a “one off”, they could suspend/ cancel your BAEC membership or they may seek to recover the increased fare mandated by the amended itinerary (though I believe the latter is highly unlikely). If you are going to do this, seek a return trip via LGW or LCY, so they will have to check your bag to LHR and then claim “stuck in traffic” if you need to – you could even call in and “alert them” – if they offer to change the booking, you’d need to have a good reason why you didn’t need this.