The Daily Mirror listed the MGF, TF and Rover 45 as vehicles not compatible with E10 fuel in an online article today. Given the answers above, this all has the hysterical whiff of what happened and was said when unleaded petrol was introduced. I ran my Frogeye Sprite for years on unleaded with the odd glug of Redex and never had any valve seat erosion. My TF will perhaps get it's first fill of E10 later today.....