Martin Lewis' MoneySavingExpert.com website has issued advice to those who don't know whether they should fix their mortgage now, or hold off.
Even though inflation fell to 8.7% in the year up to April 2023, core inflation - which strips out energy and food prices - is still rising.
Analysts say this could mean another Bank of England base interest rate rise on June 22, up from the current figure of 4.5%.
