Just to trow a spanner in the works .If your 18 don't you need to take a trailer licence first . I would recomend you check first as the police love pulling land rovers towing trailers
New drivers from 19 January 2013
Category B
There is no change to category B entitlement to tow trailers.
Category BE
If your trailer weighs over 750 kg and the combined trailer and towing vehicle weight is more than 3,500 kg, youll need to pass a further test. The trailer you tow must not be heavier than 3,500 kg. This test will be shown on your driving licence as category BE.
Category C1E
To tow a trailer weighing more than 3,500 kg with a car or small vehicle (category B), youll need to pass a test for category C1E.
Thought this was already in place so i will go and stand back in the corner
I know hence my little post at the bottom
Depends on the unloaded and max loaded weights of your 90. For a vehicle with a GVW of 3500kg, you can tow a trailer of a max weight of 750kg. For a vehicle with a GVW of less than 3500kg the max weight of the trailer added to the max GVW must not exceed 3500kg, nor can the trailer be heavier than the vehicles unloaded weight. Your 90 has a kerb weight of approx 1750kg and a GVW of 2400 kg. this means you can tow a trailer with a max gross weight of 1100kg as this will take the combination up to a max train weight of 3500kg and the max trailer weight is also less than the unladen weight of the 90.