You need a test centre which can do both class 3 and class 4.
I use Pretty's in Partridge Green just south of Horsham. No website but phone on 01403 710215
I had a list but it's 2018 so maybe a bit out of date - however others near you were:
ASH VALE MOT CENTRE LIMITED STATION ROAD WEST ASH VALE ALDERSHOT GU12 5QD 01252 545425
TOWN & COUNTRY CARS 165 LONDON ROAD HOLYBOURNE ALTON GU34 4HA 01420 82288
PHILLIPS OF WORMLEY PETWORTH ROAD WORMLEY GODALMING GU8 5TU 01428 682104
