At last! Got my car back on Friday and WHAT A DIFFERENCE! This is the car I wanted 1 year ago, finally you can control it around town, turning corners safely
I got software version 2.34.
I do find it strange that dealers are so hit and miss with this issue. A week earlier, my dealer didn't have a clue either, but then Phoenix trail blaised the issue with them, meaning that mine was relatively straightforward. If your local dealer is pleading ignorance, then perhaps a call to BMW UK customer services is in order? I've found them more than helpful before on a different issue.