P0089 - Fuel Pressure Regulator 1 Performance
Since the car was around 4 years old (the first time) I've ended up in a situation roughly every 3-4 years or 30k miles where under heavy sudden accelleration (mostly repeatable with a double clutch down shift and immediately on the power) the car looses power and enters limp mode (I think limited RPM and no turbo).
Bosch N2046 Fuel Filter cost of £36.90 in early 2022 from an Ebay supplier.
Fitter for £30, I did not attempt to fit it and ask a local mechanic.
The replacement was done at 103440 miles and at the "limp" mode issue has not recurred.