I have had the vehicle checked out by my Morgan centre and everything mechanical checks out knock sensors etc so it would show that it is the fuel that makes the difference here having driven the car now for 300 miles + with the new BP fuel the difference is amazing as I said in my earlier post it is like a totally different car with so much more get up and go and even the engine note appears to be sweeter somehow. And I was getting great MPG originally but now with the better fuel I'm getting noticeably more MPG too. One thing is for sure that I will not use any other fuel in Her-Ladyship from now on. Now she is perfect in every way.
Thanks once again for all your input and advice on this forum what a fantastic community you all are and I'm so pleased to be part of it too.