Money works because everything equals the same value

In the UK monetary system, different forms of money circulate at the same value. A £1 note, a £1 bank deposit, and a £1 digital payment are all expected to be interchangeable at par.

This principle is known as the singleness of money. It is one of the foundations that allows payments to function smoothly across the economy.

It ensures there is no confusion about value when money moves between banks, payment systems, or physical cash.

Why money must stay at par

For money to work as a reliable unit of account, it must always represent the same value across all forms.

If £10 in one bank account were worth less than £10 in another form of money, everyday transactions would become uncertain. Businesses would need to constantly check conversion values before accepting payments.

The Bank of England highlights that singleness allows households and businesses to trust that money has the same value at all times, regardless of where it is held.

The role of central bank money

In the UK, central bank money is the anchor of the system.

Banknotes issued by the Bank of England are risk-free in nominal terms and always accepted at face value. Commercial bank deposits are widely used in daily payments, but their value depends on the ability to convert them into central bank money at par.

This convertibility is what holds the system together.

Without it, multiple “types” of pounds could emerge with different values.

Why banks do not create separate currencies

Commercial banks create most of the money people use in daily life through deposits. However, these deposits are designed to remain interchangeable with central bank money.

This structure ensures there is a single currency unit in the economy, not competing versions of sterling with different prices. This shared value system is what keeps pricing simple and predictable across markets.

What maintains singleness in practice

The Bank of England framework shows that singleness is not automatic. It is maintained through a set of institutional mechanisms:

• Regulation of banks and payment providers
• Access to central bank reserves
• Settlement systems that guarantee finality
• The ability to redeem deposits at par value

Together, these elements ensure that money does not fragment into different trading values.

A simple example

A customer pays £50 from a bank account to another person.

Even though the money moves between different banks and systems:

• The sender loses £50
• The receiver gains £50
• No conversion or price difference occurs

This happens because both sides ultimately rely on the same central monetary framework.

Why singleness is important for the economy

Singleness supports three core outcomes:

• A stable unit of account for pricing goods and services
• Confidence that money is always accepted at face value
• Efficient payments without constant conversion between different forms of money

The Bank of England describes this as essential for both monetary and financial stability.

How ReDeFi applies singleness of money

ReDeFi applies the principle of singleness of money to a fully digital, onchain environment. Each unit of value issued within the system is designed to represent regulated bank money at a fixed 1:1 value.

Instead of introducing separate layers of unanchored digital assets, ReDeFi mirrors existing bank money directly onchain while preserving its parity with the banking system.

The objective is simple:

A digital pound onchain should always equal a digital pound in the bank system, without deviation, fragmentation, or pricing differences.

This approach aligns with the core principle defined by the Bank of England: a monetary system only functions efficiently when all forms of money remain interchangeable at par.