Fairey Battle F was L5436 of 142 Sqn (from other photos of the same location).
Regarding P2959, other photos seem to show it uncoded:
https://www.worldwarphotos.info/wp-c...ttle_P5238.jpg
P5238 looks the same, although the code could be faded:
https://www.worldwarphotos.info/gall...e-p2190-p5238/