They recently moved G-BOAB from Hatton Cross, it was sitting outside the Cathedral Hangar on Sat 16-Feb looking for all the world as if it were holding short of 27L. I assume your friend may have seen her towing.
They did, apparently, repaint this aircraft though, which is a nice touch as she was getting a bit rusty and dirty just sitting there.
Not sure if she has been painted since she was grounded, and it really shows unfortunately. UNLESS it's been done since Sep last year when I had a close look at the open day.