Building society mortgage boost

Alastair Grant/AP/Press Association Images

Several building societies increased their share of the mortgage market last year while some of the biggest lenders saw a decline, new figures show.

Lending remains "heavily concentrated" in the hands of the six largest lenders - Lloyds Banking Group, Santander, Barclays, Nationwide Building Society, the Royal Bank of Scotland (RBS) and HSBC - the Council of Mortgage Lenders (CML) said.