The highest octane rating you get in UK that I have seen , Is 98.
Nope the person was right, Tesco sell a 99 Octane fuel which has a percentage of bi-ethonol in it, and Shell V Power is rated at 99 as well even says so on the Shell site.
And right here in Milton Keynes there are two petrol stations that offer BP Ultimate 102 Octane fuel, but this is very expensive at about £10 a gallon and is meant for track days etc and is only sold in a few stations near tracks (Milton Keynes near Silverstone)
Heres what i copied from a press release on it;
BP have released their Ultimate 102 Unleaded high-performance petrol onto several testing forecourts in the UK.
The revolutionary high-octane fuel is designed specifically for motor sport enthusiasts and is a dream come true for a tuned engine. It meets the same high spec of fuels used in F1 racing and the World Rally Championships.
It gets its name from its octane number of 102 and was designed to allow highly tuned engines to perform at their best. It also fully complies with BS:EN228 which is the UK specification for unleaded petrol - meaning it can be used legally on the road.
The exclusive fuel is ´hand made´ in small batches at BP´s speciality fuels technology centre in the UK.
BP Ultimate 102 unleaded is currently under trial at 6 sites across the UK, adding another 3 in June. If demand for the fuel is strong, BP will consider making it more widely available. A specialist fuel, the cost is £2.42 a litre but BP are confident that the motor sport enthusiasts this fuel is aimed at will welcome the chance to buy fuel of this type.