The Government have made no estimate of the number of repossessions arising from actions by specific categories of lenders in the last 12 months. The Financial Services Authority (FSA) publishes quarterly data on residential mortgage lending, covering the period from the first quarter of 2007, available at:
http://www.fsa.gov.uk/pages/Doing/Regulated/Returns/IRR/statistics/index.shtml
These data are collected from all lenders with FSA authorisation, regardless of individual firm or product characteristics.