Hi - read this thread with great interest - isn't it marvellous to gain the recollections and insight about these great aircraft from those that flew or maintained them?
Anyway, looked through and could not find this video mentioned - found it on youtube - not mine - but hopefully it will be of interest to some on here...... There are some extremely clear shots of the Sunderlands of 230 Sqdn in 1952 - in colour, too!
https://www.youtube.com/watch?v=0QLIq9-uEEM