Derbyshire Building Society is a trading division of Nationwide Building Society which is authorised and regulated by the Financial Services Authority under registration number 106078. Credit facilities other than regulated mortgages are not regulated by the Financial Services Authority. You can confirm our registration on the FSA's website, www.fsa.gov.uk or by contacting the FSA on 0845 606 1234 . Head Office: Nationwide House, Pipers Way, Swindon, Wiltshire SN38 1NW. This site is intended for UK residents unless otherwise stated.