The cliff falls at Pennington Point have been well documented:
Futures Forum: Pennington Point: more cliff falls
Futures Forum: Pennington Point: latest cliff falls
Futures Forum: Pennington Point: 1950 and 2013
Futures Forum: Pennington Point: 1983 and 2013
Futures Forum: Pennington Point
And there are studies of the currents and movements of the sea in Lyme Bay:
Futures Forum: Longshore drift at Sidmouth
Futures Forum: Longshore drift at Sidmouth: photographs from the shore
Meanwhile, there have been numerous announcements over the years:
Futures Forum: 28th January 2003: "EDDC is proposing a coast protection scheme aimed at reducing the rate of cliff erosion at Pennington Point. The scheme would protect the properties located at the top of Salcombe Hill and the Alma Bridge."
Futures Forum: 23rd July 2009: "DCC supports the ‘hold the line’ policy option for continued investment in maintaining existing coastal defences to prevent flooding and erosion, and to leave undeveloped and open coast to evolve naturally."
Futures Forum: 24th April 2011: 'Popular Alma Bridge, a gateway to Salcombe Hill for a quarter of a million residents and visitors every year, is just 24 months and eight metres away from being lost forever, campaigning cliff-top residents fear'
There has been some discussion on the Streetlife network on the geology of the area - and how understanding it might be of help to the Beach Management Plan:
Streetlife | Geology and erosion at Sidmouth
Here is the website referred to: It is truly remarkable in the detail of information presented, with some excellent photographs:
Geology of Sidmouth, and Ladram Bay, Devon