Building Societies (Funding) and Mutual Societies (Transfers) Act 2007

The Building Societies (Funding) and Mutual Societies (Transfers) Act 2007 (c. 26) (sometimes referred to as the Butterfill Act) is an act of Parliament of the Parliament of the United Kingdom. The act gives building societies greater powers to merge with other companies.

Passage through Parliament
The bill was introduced as a private member's bill by Conservative Member of Parliament Sir John Butterfill, originally titled the Financial Mutuals Arrangements Bill. It was also known as the Butterfill Bill.

Mergers under the act
There have been several high-profile mergers under the auspices of the act.

In August 2009, Britannia Building Society merged with Co-operative Financial Services (part of The Co-operative Group). Britannia initially continued as a brand, although owned by the Co-op.

In February 2011, Kent Reliance Building Society pooled its assets with American private equity bank J.C. Flowers & Co.. J.C. Flowers & Co. has a 40% interest in the new bank, named OneSavings Bank plc, with the other 60% in the hands of Kent Reliance Provident Society, a mutual organisation owned by former Kent Reliance BS members. The bank trades as Kent Reliance.