Bit of a grey area really.
The DVLA say that Bull bars fitted to road vehicles have to be tested to ensure they don't pose a greater risk of injury to other road users than the front vehicle they are fitted too. LR sold a front protective item which was tested to make sure it posed no greater risk than the front of the vehicle. There are also the impact sensors to consider, which will be affected by a bar that the vehicle wasn't designed to take. There's not even anywhere on the front of the FL2 to actually carry a bar without an amount of re-engineering of the front structure, again effecting the way the vehicle would behave in a collision.
Insurance companies don't like metal bars because of that massive increase in severity of injury to pedestrians.
There is a winch tray available from Muddy Mods, but that fits behind the front bumper shell, avoiding increase injury to a pedestrian.
From a personal point of view, there's no need for anything more than the LR accessory protection bar, except maybe in the Australian outback where kangaroos are an issue.