Finally an update worth mentioning.
After about a year of pain trying to get things sorted on this and it never really running properly on the hybrid turbo at the start of September it was given some fresh oil and plugs and sent off to Big Fish Tuning to work his magic. And magic is exactly what was worked:
So on the Beach Buggy Turbo K418T it is now running 366bhp 361ft/lb of torque and I couldn't be happier with it. You can see from the graph its all in the mid range which makes it all very useable but when you go to the redline and dip the clutch it gives a very satisfying pop which makes it all the more worthwhile to go up there before changing. It's literally at the edge of traction, you get a squirm from the front end as it tries to get the power down and when it's down, it goes! it's strong on boost and due to the way it's mapped it's just useable everywhere, whilst still being civilised at 30mph although it doesn't take much for it to take off. For a FWD car, I think it's pretty much at the point of adding anymore power/torque and it'll be useless, just lost in wheel spin.
I've got to say the car is totally transformed and the love is back big time for this now, everything on it now seems to just work together so well. I'm even thinking about what to do next but for now whilst I'm studying it's just going to get driven
I can't recommend big fish tuning more!