SIR – Concerning Ron Harding’s ‘Where’s the progress?’ (Letters, April 15), I am sure Godfrey Bloom, whom he called an imperial dinosaur, buys his petrol in in what I consider the worst metric unit, litres.

He has no choice but he knows a litre is equivalent to 35 fluid ounces, which we still use and therefore there are just over 4.5 to the gallon and he can convert to gallons at the pump. The facile decimal metric system is alien to a nation that tends to think in fractions rather than percentages, one-sixteenth for example, not .065 per cent.

In the French open markets vegetables were and perhaps still are sold by the livre (pound).

The only good thing about metric is that the old dinosaur Napoleon did not like it and this dinosaur doesn’t either.

Philip Bird, Nab Wood Terrace, Shipley