The Spanish lender’s British branch said profit before tax jumped 9 per cent to £1.6bn over the nine months to September 30 compared with a year earlier, but cautioned that the long-term outlook might not be as buoyant.
Chief executive Nathan Bostock said: “Although we have not seen a material impact on our business in the short period since the EU referendum, we do expect a more challenging macroeconomic environment ahead.
“This increased caution has prompted us to revise our 2018 return on tangible equity, cost-to-income and NPL ratio targets, as disclosed at the 2016 Banco Santander strategy update in late September.”
Results also showed a pension hit following the Brexit vote, and comes as company schemes are hammered by falling bond yields.
Santander UK said the defined benefit pension scheme had fallen into a £258m deficit, compared with a surplus of £483m a year earlier.
The bank has also put aside an additional £30m to cover costs related to the mis-selling of payment protection insurance, bringing its total provisions over the past nine months to £397m.
The UK banking industry’s PPI bill is already colossal, at more than £30bn so far.