Hi!
I don't know if it concernes the UK, but it does concern large parts of Europe: the introduction of E10. 10% ethanol is added to the fuel. The ethanol can cause corrosion and damage the fuel system due to it's aggressive nature. Also the fuel decomposes faster and the slcohol draws water.
A possible solution is to buy expensive additives or search for fuel stations still selling E5.
Or, much easyer: add a bit of two-stroke oil to the fuel tank! Though is must be of API TC and/or NMMA TC-W3 specification. The oil stabilises the fuel and can neutralise decomposition products (certain acids).
A mix of 1:100 to 1:500 is enough to protect the fuel system and will not smoke (modern API TC oils are smokeless anyway), nor smell. API TC guarantees it's compatible with catalytic converters as well!
I don't know how relevant this is for the UK - at least for those travelling through France it is
Cheers,
Jan
PS: This is no wild theory - it has been confirmed by Bosch.
I don't know if it concernes the UK, but it does concern large parts of Europe: the introduction of E10. 10% ethanol is added to the fuel. The ethanol can cause corrosion and damage the fuel system due to it's aggressive nature. Also the fuel decomposes faster and the slcohol draws water.
A possible solution is to buy expensive additives or search for fuel stations still selling E5.
Or, much easyer: add a bit of two-stroke oil to the fuel tank! Though is must be of API TC and/or NMMA TC-W3 specification. The oil stabilises the fuel and can neutralise decomposition products (certain acids).
A mix of 1:100 to 1:500 is enough to protect the fuel system and will not smoke (modern API TC oils are smokeless anyway), nor smell. API TC guarantees it's compatible with catalytic converters as well!
I don't know how relevant this is for the UK - at least for those travelling through France it is
Cheers,
Jan
PS: This is no wild theory - it has been confirmed by Bosch.
What more damage 
