England - Info
British Canoeing website.
British Canoeing Sea Kayaking site.
Bing Maps will help you find places mentioned.
Military Exercise Areas - the Lulworth Ranges - details. Ministry of Defense contacts for some of the military exercise areas are to be found in this discussion and this one. See also the Ministry of Defence webpages for contacts.
Planning your first multi-day trip? Mark Rainsley's article "a Special Kind of Freedom" is essential reading.