How’s your glass?

sir – While I welcome the return of the Crown Stamp to beer glasses (Letters, September 20), I am more concerned that current laws allow beer served in pint glasses to consist of 95 per cent beer and up to 5 per cent foam.

My favourite beer costs £3.50, meaning that I could be paying 17.5p for the foam. It is also common for a “pint” to be dispensed with more than 5 per cent foam. I once heard a Campaign for Real Ale devotee say that buying a pint in Britain was like buying a dozen eggs and receiving 11.

Years ago beer glasses were larger and had a line indicating the level of a pint. Much to the delight of publicans, they fell out of use.

Ken Atkinson

Doncaster, South Yorkshire

sir – Peter Brass (Letters, September 20) thinks that resurrecting the imperial system is unlikely to impress our trading partners.

I suspect, however, that the United States, the world’s largest trading nation, will be more than impressed that we are willing to use the system of weights and measures that we gave it. Nicholas Young

London W13

sir – I see that the weight of Princess Beatrice’s baby daughter was announced yesterday as 6lb 2oz. Elizabeth Johnson

London SW5