I owe you an explanation. Yes, petrol is expensive. Which is why these protests have taken place all over the world. It's true that it's cheaper elsewhere in Europe. But VAT is often higher there.
Income tax is higher.
Business taxes are higher. There are road tolls and higher national insurance charges. It's true that there will be extra revenues coming to government as a result of higher oil prices. But they nowhere near cover the protesters' demands. And there's something more.