Hello Lee
There is a brief description contained in our database of boats, of events surrounding the loss of MTB 666 and capture of some of its crew, which was drawn from an article which originally appeared in one of the newsletters of the former Coastal Forces Veterans Association. I will try and look out the article for you later.
MTB 666 was was lost during an action off Imjuiden on 4/5 July 1944. MTBs including 666 had engaged a heavily protected convoy heading towards the invasion fleet area, when 666 was struck in the engineroom by shellfire from a shore battery, putting the boat out of action and causing a number of casualties. The boat had to be abandoned with the surviving crew taking to the water, where they had to survive for several hours before being picked up by Allied ships. It is known that a partially submerged 666 was brought into Imjuiden between two German flak trawlers, and patched up sufficient to allow inspection of the vessel by naval experts, prior to the boat spontaneously exploding inside the E-boat pens it had been taken to, killing German personnel onboard her at the time.