Picture quality not great but Ray Hanna was right in the thick of this movie for a few seconds and as I was there I saw how close Ray got to the cameras during the shelling sequence. After the filming had finished he gave a quick but amazing display using the Guernsey cliffs and the blockhouse as a backdrop.
YouTube - The Blockhouse
Action with Ray is at about 5:35 onwards.
Strange WW2 film with Peter Sellers in sombre role, entombed in a Guernsey blockhouse. After the inmates run out of candles the inspired director shot the final sequences in pitch black! Most cinema goers had left their seats by then!