According to official site - postage is maximum of £10.00.
Payment & Shipping Info All our parcels are sent by Royal Mail or Target, by guaranteed delivery services which require a signature on receipt, and which insure the goods in the event that the parcel should go astray.
The charges quoted are the MAXIMUM and are approximate. Postage is charged according to the weight of the parcel, and the service required to insure the value of the goods.
ORDER VALUE UK EIRE / EUROPE REST OF WORLD Under £2.00 £0.70 £2.00 £3.00 Under £5.00 £1.50 £3.00 £5.00 Under £20.00 £3.50 £7.00 £10.00 Over £20.00 £6.50 £17.50 £25.00