Hi Noel & Robert,
Thanks for your comments.
I will forward the videos to my dealer and ask them to send them to MG for their views.
I planned on keeping this car for several years (until state pension age - 6 years) but I doubt the engine will make it until then so I'm going to explore my right to return it under the Sale of Goods Act. Not holding out much hope + I've driven 4000 miles in it now.
I did set the screen to show mpg but it inexplicably reverts to the basis screen whilst driving.
However, across the whole journey my mpg is pretty good - about 55 if I recall correctly. My wife did notice whilst going uphill, with over-revving, the 'miles until refill gauge' drops dramatically.
Since the PD052 update (and warmer weather) my mpg has increased significantly and the car goes into EV mode a lot - which is great. But the over-revving is now worse and can suddenly occur on straight flat roads - notably, but not always, before going into EV mode.
I may try and release the videos "globally" on YouTube to highlight the issues and get more opinions.