The Department of Transport have announced an increase in width limit for light trailers. The new width limit is 2.55 metres (including mudguards), irrespective of the towing vehicle.
Formerly, there was a width limit of the 2.3 metres for light trailers towed behind most cars and 4x4's*. This has been increased to 2.55 metres for light trailers (categories O1 and O2) up to 3500 kg gross weight is irrespective of the towing vehicle, be it car, 4x4 or qualifying commercial vehicle. This brings the UK into line with the rest of Europe. This means it'll be much easier to move larger trailers around. If you do plan to get yourself a larger caravan or boat trailer, check your vehicles maximum towing weight. This information is usually available in your vehicle handbook.
*a vehicle with maximum authorised mass less than 3500 kg (meaning the maximum gross weight of the vehicle plus the trailer)!!