Open up the holds again and stop the checked-bag rip-off or, if nothing else, reduce the exhorbitant charges to encourage bags out of the cabin and into the hold.
When you have waited over an hour at LHR for your checked bag to re-appear on a flight that was shorter than an hour, you will realise why some of us prefer to take hand luggage only. If only ground support was prompt, then maybe we would feel better about having to check bags in when we'd prefer not to