Major UK lenders, including Santander, Nationwide, and Halifax, have raised mortgage rates following unexpected inflation increases, signaling a potential market-wide repricing. Barclays has adjusted its interest rate forecasts, now predicting the Bank of England's base rate will reach 3.5% by February 2026, with no cuts expected in June. The rise in mortgage rates is attributed to climbing swap rates, which have increased by about 0.3 percentage points recently.