Thank you so much for all your replies - very informative.
I am hoping to discover which squadron the mosquito was from - though this may be like looking for a needle in a haystack. If anything comes to light, I shall return and post.

The copy of Horst's report is in the Mosquito Air Association archives, sent in as a contribution (sadly, no author name on report). The MAA archive is now under the care of the Second World War Experience Centre in Yorkshire.