Right, new Pedal Assembly Fitted today, not fixed the problem
Will be running to the garage after work and having the clear any fault codes, I will then drive it and if any new ones are picked up, they should be able to identify it.
After reconnecting the battery today (removed when changing pedal assembly), the ESP/BAS light was showing, but then after 1 min of driving it went off again. The car still wont accelerate like it should though so I believe I am an experiencing Limp Mode.
After having it diagnosed again later, my next step may be to buy another Throttle Body
Ill keep you all informed and thanks again