I just bought this from vitacost.com for $25 (dollars!) per bottle of 250 capsules (same as candida force) with a $6.99 shipment to the UK. With today's conversion this works out at £35 total for two bottles.
Nextag.com can give you a comparison of prices from different companies (though not all ship to UK).
You can also get it at health4youonline.com (a UK based company) for £35.75 (pounds!) each with couple of pounds for shipment.
I know this response is very late but maybe it helps someone!