Based on $999 ex works plus (say) $110 shipping and insurance, this is what I got from a website:
Total customs value (CIF): £662.90 This is the amount that customs values your import at.
- Duty: £31.16
- VAT: £138.81
Total import duty & taxes due: £169.97 This is the amount that needs to be paid to customs.
Total landed cost: £832.86 This is the total cost of importing, including product, shipping, insurance and import duty & taxes at exchange rate of 1 GBP = 1.67 USD
And there may be a charge on top if Royal Mail or the courier pay the customs clearing costs and charge you a fee. RM is £8 I think.