Mortgage lending dropped in June as banks approved the fewest mortgages since March last year and cut business lending.
House purchase approval numbers were 11 per cent lower than in June 2015, but have "bounced back a little" from the numbers seen after the introduction of a stamp duty hike on second homes, the British Bankers' Association (BBA) said.
The number of mortgage approvals fell to 40,103 from 41,842 in May.
Lending to non-financial business decreased by £526m in June - the first fall in 2016.
"This month's high street banking data reflects the uncertainty that was felt ahead of the EU referendum," said Rebecca Harding, BBA's chief economist. "Business borrowing in June dropped for the first time in 2016, signalling that investment decisions were being delayed until after the vote."
Harding added: "Mortgage lending and approvals also fell back in June but remain above the low levels seen in April following the introduction of the stamp duty surcharge."
Jonathan Harris, director of mortgage broker Anderson Harris, said: "June's mortgage lending figures are too close to the event to be truly conclusive, although they indicate that lower mortgage lending and approvals were a result of the uncertainty surrounding the referendum.
"However, gross and net mortgage borrowing were still both higher than a year ago."