I've realised my search of my slide index was incomplete. I also took photos of the following with TOPS numbers which were still in green livery (Pre-tops numbers in brackets):
06001 (2413) 47362 (1881) 40183 (383) 40169 (369) 47527 (1110) 40199 (399) 40035 (235 APAPA) 47227 (1903) 47033 (1613) 40052 (252) 08876 (4044) 47206 (1856) 37230 (6930) 47094 (1680) and 47256 (1934). The last one was taken on 26Jan77.
I realise the OP was asking about sitings of 27024 in green, so my additional info is unsolicited. Still, I hope someone finds it useful. This conversation is exactly the reason I share my photos - to stir up memories from the time.
Ray
Kings Norton