Geoffrey
If you go to my website at
http://community.webshots.com/user/hastingsgan and check out any of the Katunayake/Negombo albums (there are 6). If you let me know if there are any photos that may be of interest to you I can rescan them to a higher resolution. There are a few of the Speedbird Britt and Comet on their Far East Proving Trials as well as others in colour from the 1950's.
John