Yes, but how much in British pounds?
In reality, it's a difficult question, lots depending on IRR (internal rate of return) and WCC (weighted cost of capital). If you say 'since it's launch', then you're only factoring in marketing and sales in addition to the manufacturing costs. Prior to that they had development and manufacturing tooling, which undoubtedly cost quite a bit. Still, they're making money on each unit, so it's only a matter of time. I'm in finance, and 'How much money have we made?' all depends on who's asking and who's telling.
As for dealer markup, that doesn't usually go back to corporate.