Your Gran's ISA is Going On-Chain: Monument Puts £250M of UK Savings on Cardano's Privacy Rail

Monument Bank, a UK challenger bank that's less 'disruptor' and more 'polite queue-jumper', plans to tokenize up to £250 million ($335 million) of retail customer deposits on the Midnight network. This marks the first time a UK-regulated bank has dared to touch a public blockchain, presumably after its lawyers checked it wasn't too spicy.

These tokenized deposits will remain interest-bearing, fully backed by the bank, and redeemable one-for-one in boring old pounds sterling. Crucially, they'll still be covered by the UK's Financial Services Compensation Scheme, meaning your digital pounds are as safe as the physical ones currently earning a princely 0.5% in a high street vault.

While other banks have dabbled in tokenized deposits, their work has largely been for institutional whales or within closed, permissioned networks where the fun goes to die. Monument is aiming squarely at retail, starting with the 'mass-affluent'—a fancy term for people who have more than £50,000 but still get excited by supermarket loyalty points.

Monument, which boasts over 100,000 customers and roughly £7 billion in deposits, says the first phase will simply mirror savings balances on Midnight's privacy-focused chain. Later, they'll add tokenized investment products like private market funds, because what's more private than a blockchain? The final phase promises in-app lending against those holdings, completing the classic crypto trifecta: park it, stake it, leverage it.

The blockchain plumbing is provided by the Midnight Foundation, built by Shielded Technologies—a firm linked to Cardano creator Input Output. The system is designed so transaction data is visible only to the bank and its customers, operating snugly within the UK's existing regulatory blanket, because even on-chain, Big Brother still needs his cut.

There's a broader strategy at play. Monument affiliate Monument Technology plans to offer this tokenized deposit functionality through its Banking-as-a-Service platform. This could let other institutions replicate the model, proving that in fintech, the greatest form of flattery is a white-label SaaS subscription.