There are a number of different sized crags of varying quality from friable to lethal, with climbs using rock and/or ice-climbing techniques. Unsurprisingly, none of the climbs have attained popularity. The largest cliffs are those between Ecclesbourne Glen and Fairlight Glen (where mudslides are not uncommon). Apart from the bouldering west of Ecclesbourne Glen, no activity is known to have taken place in this area for the last ten years - since the first ascents. The guidebook descriptions should, therefore, be treated with particular caution. The coastguards at the Dover Maritime Rescue Co-ordinating Centre (MRCC), should be phoned on (01304) 210008 before and after climbing. The cliffs from Hastings to Pett Beach have been designated as an SSSI because of great geological and biological importance. Its palaeobotanical and vertebrate fossils are some of the best examples of their type in the world, while two sections of the cliffs show a complex pattern of faults. A number of habitats are represented including ancient woodland, scrub, maritime grassland and a vegetated shingle beach. These support a number of rare bryophytes (mosses and liverworts), lichens, and choleoptera.