BD are increasing the LHR service to 5 x weekdays this winter. The existing 4 flights stay at more or less the same times, with the addition of a late evening service, dep LBA 21:00, arr LHR 22:00, dep LHR 22:30 arr LBA 23:30, using an LBA based ER4 (maybe the one which arrives back from EDI in the early evening?).