Distance in the UK is different. I remember driving a friend from USA to Edinburgh from London. A trip that requires planning, changing the oil, checking brakes, bringing emergency supplies, checking weather forecast and generally preparing as if your'e going to the Arctic. He thought it was hilarious to go to so much trouble for such a shortish journey (600 miles or so). After the trip though he said he was exhausted and felt like we had travelled so much further. I think because of the density of the country (you are always passing through some town or city, traffic, smaller roads etc. it just feels much further and it takes so much longer to get anywhere).
I'm driving in NYC/East Coast, which is the same kind of density. Out in the Midwest, 100 miles is simple. Here in NYC Metro, I'll see your density. I used to do Bayside Queens to Cedar Knolls NJ - a mere 50 miles, which at Rush our used to take at LEAST 90 minutes. Took as much as 3 hours, but no big deal
The club I was talking about was in Southaven County Park - 50 miles. Good day? 50 minutes. Typical? 1:20
Frankly, I drive to Rochester fairly often. 350 miles. The first 50 are worse than the other 300.
Thing is, a gallon of gas still is a gallon of gas. If you are getting 20 MPG, that 300 miles is still 15 gals. If your government is charging an extra $2/gal, they are hitting $30 deeper. It is part of the reason we hate gas taxes more