Got an email from them saying exactly this:
Spend just £49 (ex. VAT) and we'll send you this USB phone FREE*...!
This easy-to-use USB phone will allow you to make free calls over the internet (when used with appropriate software) and works as a microphone and earphone with most major instant messenger applications.
Its backlit LCD display supports all languages and makes viewing your contacts and call history as simple as using your mobile phone.
The phone apparently is a Genie Skype phone, Viking Number QE4-PRVOIPUK, if this means anything to anybody.
Also, use the voucher to get a free Leather Briefcase too.
I will try to get the picture on the email linked to this thread if somebody can tell me how to!