What (a) is the number of grant beneficiaries whose grants lapsed (i) in the (aa) 2007-08, (bb) 2008-09, (cc) 2009-10 and (dd) 2010-11 financial years and (ii) from 1 April 2012 up to the latest specified date for which information is available and (b) are the reasons for the lapse in each specified financial year?