the period commencing on 1 April and expiring on 31 March of the following year (both dates inclusive) except that the first Accounting Year shall be deemed to be a proportionate part of the Accounting Year begun on 3 October 2007 to 31 March 2008 and the last Accounting Year shall be the period commencing on 1 April 2017 and expiring on the date of expiration of the Term;