From the Website:
Hot water tap in chrome
Manufacturer Model No: 152991
Brand Name: Insinkerator
At first glance the price seemed to be for the tap only but it says that the price has been reduced from £699 to £349 which doesn't make sense if it was just the tap. So I emailed Wickes customer services to check if this includes the required Insinkerator installation Pack 44728 (which is a compact 2.5L boiler including a scale filter) and they have replied to say that it does. I also phoned them to double-check and they said "It is not just the tap - this includes everything that you need to complete the installation".
Next closest retailer seems to have this at about £420 so I've ordered one. Don't forget the 2.1% Quidco making it a possible £342.