Correct, there are some VP, MG and Wolesley ones kicking around but these are all home grown. BMC missed a massive trick here as they look much better in none base flavor.
You might think they make an amazing estate but in reality they don't! Due to the suspension you cant put anything heavy in the boot which renders it a bit useless. Still managed to get a washing machine in the back!
That said, most of the time stuff in the boot is bulky as opposed to massively heavy, would imagine great for dogs etc