For the Peugeot 4007, tyres available at Tyres.co.uk include the Pirelli Scorpion and Michelin CrossClimate 2 225/55 R18 98H which fit the factory 18-inch wheel sets. Check for size, load index, speed rating, and other specifications on the passenger door centre pillar sticker and vehicle registration.
The sizes of the tyres for the Peugeot 4007 can be located on the tyres/paint label of the centre pillar of the passenger door. After opening the passenger door, look at the body-side centre pillar. This refers to the cleared sizes of both wheels and tyres, the cold tyre pressure (and the spare tyre) as well as paint code.
Because of the on-demand four-wheel-drive system on the Peugeot 4007, matching tyres and wheels of the same size, type, and wear must be used. This means that in most cases, all four tyres have to be replaced. If a garage says that only one axle can be replaced while keeping the requirement, the new pair must go to the rear axle.