Take cases like Golder's Green and other cases of a similar kind where the value of land has gone up in the course, perhaps, of a couple of years through a new tramway or a new railway being opened. ... A few years ago there was a plot of land there which was sold at £160. Last year I went and opened a tube railway there. What was the result? This year that very piece of land has been sold for £2,100-£160 before the railway was opened-before I was there-£2,100 now. My Budget demands 20 per cent. of that.