Gamlingay Wood, Gamlingay, Cambridgeshire.
Free public access, with free parking along the side of the access track.
An ancient wood on heavy soil, many of the paths are mostly too narrow to encourage nectar plants and butterflies. The central path leading to Sugley Wood
was clear enough in 2012 for brambles and thistles to flower - to the benefit of the Silver washed Fritillaries.