Ahh, indeed exactly what occurred.
You tube it great to find out these things but in this case its not something youd search for when the car is saying all is good!!
Th garage I bought the car from ultimately has paid the £727 bill for repairing the ABS ECU so all has ended well!
The lovely people who fixed the car also gave me the full diagnostic report too, which was also nice.
Thanks for your help, I am going to tell everyone I know about this potential money waste!!