Not quite. Fuel suppliers must have a target percentage of their overall energy supply for biofuels/renewables, so some offset this in other ways. Last I checked BP Ultimate is ethanol free, except in the South West. Unlike other fuels, which use alcohols to raise octane, BP Ultimate is refined solely from oil to petrol at 98 RON (sold as 97 RON by the time it hits the pumps). That's supposedly one of the reasons it's more expensive than other brands.
Other than that fuels do all contain 5% ethanol/biodiesel.