In March 2014, the Bank of England release a report called “Money Creation in the Modern Economy”, where they stated that:
“Commercial [i.e. high-street] banks create money, in the form of bank deposits, by making new loans. When a bank makes a loan, for example to someone taking out a mortgage to buy a house, it does not typically do so by giving them thousands of pounds worth of banknotes. Instead, it credits their bank account with a bank deposit of the size of the mortgage. At that moment, new money is created

Sir Mervyn King, the Governor of the Bank of England from 2003-2013, recently explained this point to a conference of businesspeople
“When banks extend loans to their customers, they create money by crediting their customers’ accounts.”

By Michael McLeay, Amar Radia and Ryland Thomas of the Bank’s Monetary Analysis Directorate.
Topical articles Money creation in the modern economy
In the modern economy, most money takes the form of bank
deposits. But how those bank deposits are created is often
misunderstood: the principal way is through commercial
banks making loans. Whenever a bank makes a loan, it
simultaneously creates a matching deposit in the
borrower’s bank account, thereby creating new money