Tiger,
There's an article on the Skylark 2b by Brian Griffin in the current edition of 'Sailplane and Gliding,' (the British Gliding Association's magazine) which will give you some useful information. Also, in the same edition there's an article on the Olympia 2b written by Terence Henderson, ex Concorde pilot, that I think you will find interesting too.
You can get the magazine direct from the BGA at
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