Depends on whether the kitchen qualifies as “made in UK” - if so, no duty, if you can prove that. Just VAT.
However- you may find it’s easier to a) not mention it and basically become a kitchen smuggler, or b) just pay the duty and VAT because that’s easier than documenting your kitchen’s status vis a vis preferential rules of origin regulations.
Depends on whether the kitchen qualifies as “made in UK” - if so, no duty, if you can prove that. Just VAT.
However- you may find it’s easier to a) not mention it and basically become a kitchen smuggler, or b) just pay the duty and VAT because that’s easier than documenting your kitchen’s status vis a vis preferential rules of origin regulations.