Yes - sadly no Small Blue in Cambridgeshire. DD had them listed; but I am surprised that the last records are only 4 years ago since I and many other BC members have regularly transect walked and visited the DD in this time and never heard of any confirmed reports for years. It does look suitable for Small Blue and it is somewhat of a mystery that they should have just disappeared in the last 10 years, not just from here but also from the nearby Roman Road and Gog Magog hills.
The Cambs&Essex BC Branch DID visit the Gog Magog Golf course to look for Small Blue earlier this year, since they were also reportedly last seen there about 5 years ago; the habitat on the golf course is very good for grass (naturally) but not too good for butterflies and no Small Blues were found nor any suitable habitat with Kidney Vetch.
The nearest place is Totternhoe in Bedfordshire, tho' the local Nature Trust has bought an old chalk pit in Cherry Hinton which would be ideal for a reintroduction....
N
It is
Devil's Dyke - see link
http://www.cambs-essex-butterflies.org. ... .php#Devil
PS Wall Browns are mentioned, but again, I wouldn't hold my breath.....
WLH are at the public car-park on the elms nr the gap in the Dyke