Although I couldn't give the complete set of dates, there was a remarkable variety of BA operations at Birmingham over this period; mainline operations, subsidiaries, franchise operators in BA colours, and franchise operators in their own colours. Seemed to change from year to year. Some routes actually ran with a mix of mainline and franchise aircraft through the day.
Among other items, the first BA A319s, now a Heathrow fleet, were delivered new to Birmingham, where they replaced the One-Elevens; these latter normally seemed to be the ex-B Cal fleet, with the longstanding BA ones generally at Manchester. When the A319s were moved down to Heathrow, the RJ100 fleet from Gatwick was moved up to Birmingham in their place. These were the aircraft that later went to London City.