RMVENTURI . Have just Googled as you suggested >
site:
http://www.pprune.org/military-aircr...ts-brevet-ww11 (if any one wants to use this method, see RMVENTURI'S previous URL/post, as the above was corrupted during copy and paste )
It not only works well searching in pprune, but I have bookmarked the above blenheim page, and when I want to search PPRuNE just reload it from bookmarks, delete the word blenheim and substitute say Harrogate, smashing.
Thanks CLIFF.