All-terrain scooters have larger wheels, more ground clearance and stronger motors for grass, gravel and countryside paths. Many sites also lend or hire all-terrain Trampers, which is a good way to try one first.
From independent brands
Mobility scooter manufacturers with UK dealer networks. Buying through an approved dealer usually includes a home demonstration and after-sales servicing.

Supersport
Three wheel scooter with all terrain ability, high ground clearance and pneumatic tyres.
up to 35 miles · 8 mph · 31 stone (200 kg) · 119 kg total · Class 3
View at TGA Mobility
Breeze X
Four wheel scooter with all terrain tyres and all round suspension for rugged terrain.
up to 34 miles (long range battery) · 8 mph · 31 stone (200 kg) · 148 kg total · Class 3
View at TGA Mobility
BAJA Bandit
Off road scooter built for rough terrain such as forest trails and countryside paths.
up to 29 miles (40 Ah batteries) · 8 mph · 28 st 8 lbs (181 kg) · 72.3 kg without batteries
View at Pride Mobility
Mini Crosser
Scooter for urban and rural use with an advanced suspension system for all terrain performance.
37 miles (60 km) · 8 mph · 32 st (200 kg) · 124 kg without seat and batteries
View at Pride Mobility