[Dann]

So got the car back.
BMW have diagnosed it as maybe needing 6 injectors, coils and plugs

I don't believe them so am going to change the plugs them coils them 3 injectors. If that doesn't work I'll do the other 3. He also said the diagnostic couldn't be completed for some reason so it could be something else. It was also commented that it may be a fuel pressure sensor.

God knows why hpfp code was flagged up.

Drive it home and left it idling.l whilst opening the garage. It idles smooth with no misfire now. Strange