As mentioned, there are no capital gains charged to uk taxpayers on motors.
Regarding Sweeden, capital gains tax can be charged on the sale of personal assets only over a profit of SEK 50,000 (£4,420).
I'm sure you could increase you initial purchase price by an inflation multiplier to lower your apparent gain, and offset any repairs you have had during your ownership.
Current tax rate is 30% on realized capital income.
Cash is a very good thing, but is getting a rare comodity these days, and there is often not a lot you can do with it except store it under the matress.