after a set of bell lap bars £15 from the states or 25 from wiggle will the ones form the states cost a lot more with import fees and taxes?

try Customs&Excise website ?

Not sure if there’s a lower threshold below which you don’t pay, but you generally should pay import duty (4% I think on parts – more (15%?) for built bikes), then VAT and maybe a handling charge for the carrier (plus VAT)

(or possibly nothing if undeclared & “gets” through)

be carefull i got stung for about £40 on $120 of swobo gear, import tax, VAT, handling charge . made my cheap sale stuff not so cheap.

If you’re going to get stung, make it worth it. £3 of duty and £10 handling charge on £20 of tshirts was NOT worth it.

At that price the risk isn’t worth it for me. The charge that goes with an application of duty by the courier is normally £10-20 on top of the vat and fee.