boston AL756 107Sqn night/intruder markings

[brewerjerry]

Hi All,
I have been re visiting a few of my old books, in bombing colours pg146 is a photo of a boston accident, ( nose wheel collapse ), the photo shows the 107Sqn code letters and that it has been painted with black undersurfaces, it states the aircraft was dbr on 24 sep 42, (presumably a nosewheel collapse would not dbr an aircraft.)
Anyone know what date AL756 joined 107sqn or the dates black undersurfaces were applied.
cheers
jerry