For queries regarding lost accounts with banks, or with building societies that are now banks:
UK Finance
My Lost Account
UK Finance
5th Floor, One Angel Court,
London EC2R 7HJ
Email: mylostaccount@ukfinance.org.uk
Telephone: 020 3934 0329
www.ukfinance.org.uk
For queries regarding lost accounts with current building societies:
Building Societies Association
Lost Savings
The Building Societies Association
6th Floor, York House
23 Kingsway
London WC2B 6UJ
Email: simon.rex@bsa.org.uk
www.bsa.org.uk
For queries regarding lost NS&I products contact:
National Savings and Investments
Tracing Service
NS&I
Sunderland SR43 2SB
Email via contact form
Telephone: 08085 007 007
www.nsandi.com