Rich - if you order from Amazon.com as I did, the total cost including shipping to UK works out less than the £37 + Shipping + VAT from eon.  My total purchase price was :

Item(s) Subtotal:

 GBP 31.63
Shipping & Handling: GBP 5.06 
Total Before Tax: GBP 36.69
Estimated Tax To Be Collected: GBP 0.00 
Grand Total: GBP 36.69

Gill