It's running at 180bhp now. The guy said run the car on no less than 97ron. Although it still doesn't solve the problem of it seeming to lack power as I have out in higher octane petrol?!

As said before when I got it back from being remapped it was still on some normal petr and it flew!

My guess is as you use better fuel it is meant to cleanse the engine and prevent carbon build up so in doing this it could have moved some crap from the injectors.