Just back from the garage and apparently the SBC unit has failed and they want £1000 plus labour to fix it!
After getting my faith back....I am now losing it.
Why? Brake master cylinders go on most cars over there 100k miles, The Sbc is a Serviceable unit, Its a awesome system and i'm more than happy to replace it when the time comes. Yes its expensive but that is part and parcel of running what was a technological advanced vehicle when new.