Contact us

Get in touch by phone, secure message, branch or post.

Get in touch

Our teams are here to help with account queries, product information and technical support. Choose the option that suits you best.

Phone

UK: 0800 123 4567

From outside UK: +44 20 7123 4567

Mon–Fri 8am–8pm, Sat 9am–5pm

Secure message

Log in to online Unioning and send a secure message. We aim to respond within 1 working day.

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Visit a branch

Book an appointment or walk in during opening hours.

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Lost or stolen card

Report immediately: 0800 123 4999 (24/7)

Or freeze your card instantly in the mobile app.

Send us a message

Retail banking experience

Postal address

Citadel Trust Bank
Customer Services
100 Trust Square
London EC2A 1BB
United Kingdom