This lawn mower from Zipper has a minimum cutting height of 25 mm, great if you prefer a shorter lawn.
From B&Q
Zipper Brm508 20" Petrol Lawn Mower - Self Propelled 173Cc - One Size
Conrad Electronic
Zipper ZI-BRM508 Petrol Lawn mower 3600 W Cutting width (max.) 508 mm
This product is also available at 1 unverified store.