Sir David Hannay 
Britain“s Entry into the European Community [PDF ebook] 
Report on the Negotiations of 1970 – 1972 by Sir Con O’Neill

In January 1972 Britain signed the Treaty of Acccession to the European Community. Sir Con O“Neill, a key figure in the negotiations, gives an analysis of negotiations which had an impact on Britain“s relations with Europe, and insights into the processes of multilateral diplomacy.