Is mold correct in British English?

No, mold is incorrect in British English. The correct spelling for both the noun and the verb is mould. Mold is the correct American English spelling.

This is also true for all related words such as mouldy, moulder, and the verb forms moulds, moulded, moulding.

You can choose different regional settings in the QuillBot Grammar Checker to make sure you have the correct spelling of mold or mould.