Well, just in case people google in the future. Bought new battery, red lock stayed. Tried a bt scan tool to clear ( kindly provided by mak, thanks mak), but unfortunately didn't clear, so a local indie came out with there auto logic, and cleared ( free of charge luckily!!).
I had to sort out a few wires in my gear knob back to standard first, and all fired up perfectly. Bit of a pain tbh , but all sorted.
If you are unfortunate to drain your battery so much you get the red lock, get a Indie out with auto logic, 2 min job.