The original BAF one from 1982
Photos: British Aerospace BAe-146-100 Aircraft Pictures | Airliners.net
BAF didn't take any of the original production but had a few in the early 1990s, by this time in a different livery, some pictured above, which they used for a variety of work.
I've used them (and the Avro RJ successor) for many years out of London City, and indeed in earlier years on Air UK from Stansted, and have never once had a mechanical issue cause a delay. Which is more than I can say for some other types.
willy wombat : The first 146 into LCY was in BAe house colours
http://www.lcacc.org/history/146.WMV
Can you see yourself ?