Unfortunately, as you would expect they have tax pretty buttoned down for outside of the EU.
This is what they say:All other goods
If you order or send purchased goods other than alcohol, tobacco, perfume and toilet water from a country outside the EU then you:
don't have to pay Excise Duty
may have to pay Customs Duty on goods with a value that exceeds £135 will have to pay import VAT on goods with a value that exceeds £15
Note that on all goods from outside the EU, Customs Duty is waived if the amount of duty calculated is £9 or under.
Import VAT rate
The percentage charged is the same VAT rate that applies to similar goods that are sold in the UK.
So it appears they will charge 20%. That would mean you paid £200 for the calipers?
Give a man a gun and he can rob a bank. Give a man a bank and he can rob the world