Bloggs- nice tip (with a 'p') I tried that and saw the same images- which direct you to Pprune.org! Others have been down this path.
I did OASC Biggin Hill just before BofB Sunday, 1969. I asked around as to the pub where the remaining 'few' gathered on the 15th, duly travelled down by train early on the evening- and saw- a vast number of bikers and no-one that remotely resembled anyone I expected to see! I always thought I went to the wrong place. Now this thread tells me I got it right, and I'm not the only one who saw bikers.