You need a Land Rover with a key optional extra. I grew up in Norfolk, and provided you have this optional extra a Land Rover will not get frowned at.
Go for a 2.7 Discover or 2.0 Freelander to get your running costs down to 60p-70p, rather than the 90p per mile that your Land Cruiser will be costing you.
And just add mud. With mud you look like a local farmer and they need 4x4s.