The Vita Nuova Liberal Source Licence http://www.vitanuova.com/inferno/licence.html may be a free software licence designed for the UK. I would appreciate help checking it.
The licence of http://www.polyml.org/ would be a free software licence if one term (forced disclosure upstream) was fixed. See http://lists.debian.org/debian-legal/2002/debian-legal-200207/msg00011.html
There's a creative commons UK localisation project: http://creativecommons.org/projects/international/uk/ One of a number of localisations, the aim is to audit CC licenses for the UK (and shake out any US-specifics from the original licenses), and there's some heavyweight legal minds involved. Apparently, no CC licences are free software licences http://lists.debian.org/debian-legal/2004/debian-legal-200404/msg00031.html
The [EU DataGrid Licence] is listed by OSI, but seems likely to be non-UK.
Reportedly, there are few material differences between the copyright law in England and Wales and other UK parts. (Space Bunny post to fsfe-uk and private emails.)
CDPA 1988 as amended http://www.jenkins-ip.com/patlaw/index1.htm
Daniel A. Tysver (Beck & Tysver), "Implied Licences", in Bit-Law, http://www.bitlaw.com/copyright/license.html#implied
Goetz, C. and Scott, R. The Limits of Expanded Choice: An Analysis of the Interactions Between Express and Implied Contract Terms, 73 Calif. L. Rev. 261.