The increase in the fee for applying for probate (where there is a will) or letters of administration (where there is no will) which I predicted at https://www.breakinglaw.co.uk/search/label/probate is to take effect on 26 January 2022 (see The Non-Contentious Probate Fees (Amendment) Order 2021 SI 2021/1451).
The new fee will be £273 whether you are applying in person or through a professional such as a solicitor. Get the application in before 26 January 2022 and money will be saved.