Amazon is only a reseller and it would appear that the product description they have listed is out of date. For compatibility information you should look to authoritative sources like the manufacturer website or the Windows Compatibility Center. In this case the Windows Compatibility Center does not yet have compatibility information regarding this device. The previous version, the Spyder3Express, is also deemed compatible and does have an entry. You can help make the Windows Compatibility Center database more complete by submitting feedback to alert them that Datacolor lists this product as compatible.
If there is a specific UK version of the product you may want to look further into compatibility information on the UK site or for a UK version of the product, but where Datacolor only lists one product by the name Spyder4Express, it would appear that there is only one version sold internationally.