Aggressive Turtle / Low Power mode after last dealership visit

Update
Still no joy... 37% battery, 45 miles of range. Steady at 70mph on the motorway. Vehicle fails to give more than 30% power to accelerate up hill.
Currently sat in an MFG charging station topping up to get home.

Update
Car went back into the dealership a few weeks ago for a service. Whatever updates they installed worked a treat.
At the weekend, on my first long trip, the car went from Sheffield to Beverley, then to Barton-upon-Humber, then back to Sheffield no problems.