Thanks JB! I thought I would just need resistors on indicator upgrade; just shows how clever our cars are in spotting any other changes.
I will have have a play comparing 'standard' with LED; immediate reaction is that lamps look 'redder' (Am using red LED lamps) but the difference between brake on and off luminance is less than I thought it ought to be, the acid test will be to change one side and take a couple of pics; which I will post here. I'm not 100% convinced the effect is worth it.
After my initial high expectations I want to be sure its worth the hassle of splicing 6 resistors into what is quite a limited space, will take some pics of the procedure also to create a 'miniguide' for owners wishing to change their own lamps, though it very simple procedure. TBC