found one or two things using google , but nothing too specific
http://www.britten-norman.com/produc...b/moreinfo.htm
this was an interesting read
http://www.britten-norman.com/brochures/islander.pdf
some information from the caa uk on registered types
http://www.caa.co.uk/docs/393/srg_acp_ba08-12.pdf
just a few of the things i could find ..
hope it is of some use
flyboy