US Royalty payments

I am a UK tax payer and I receive infrequent US royalty payments from my US grandfather's literary estate when the rights to one of his books are sold. I am unclear about how to report these to HMRC. I have put the amount on page F2 which lists, overseas pensions, social security benefits and royalties. Is this the right place for it? I am 100% British and it feels like this box might be for Americans...also it does not give me the opportunity to declare the hefty bank charges that I incur.

Hi Granddaughter,
BIM50725 advises that the royalties received by an individual other than the author, are chargeable to income tax, as miscellaneous income BIM50725 - Authors and literary profits: royalties to person other than author
Miscellaneous income is declared in boxes 17 to 20 of page TR3 on SA100 or the online equivalent.
You would only need to declare the royalties in SA106 (foreign) if any foreign tax is payable.
Where foreign tax in not payable, but has been paid, you would need to claim this back from the foreign country in question.
You may require a certificate of residence, which can be requested online  here:
How to apply for a certificate of residence to claim tax relief abroad
Thank you.