Paul challenged me on why I didn't take into account the cost of tax and insurance, and depreciation of the car. Here goes, then:
Interesting point, Paul
I'm not worried about tax or insurance, since I would need a car anyway and I would need to pay this regardless of whether I use it for work or not. And, of course, my figures for taking the train don't take into account this either (I would need to drive to the station) so I think it's a fair comparison.
As to depreciation - it is a 1998 BMW 5-series with 120,000 miles on the clock. Relatively speaking, it was worth nothing when I bought it, it's worth nothing now, and it will be worth nothing when it explodes and I buy another one. It's called Bangernomics. Oh and it still cruises silently at 90 on the M4 whilst I listen to Radio 4.
