I HAVE just handed over £3.05 for a flat white – and a good one too – at one of the outlets at Glasgow Airport. The price at this coffee box – you can't call it a cafe – has gone up considerably since I was here just a few months ago when it was well under £3. And it is well above the prices in the city just a few miles away.

It cannot all be due to the fall in the pound. It can't be because it is so isolated that it has to air freight the ingredients in. It's not because it is made with expensive exotic coffee beans that pass through the gastro-intestinal tract of a civet cat. It can only be because the airport charges such exorbitant rents and the owners of the outlet know that they can get away with it: we are a captive audience and security regulations prevent us bringing flasks of tea and coffee through to airside.

I know that a decent flat white is hardly essential for life, but what has happened to past promises that similar goods will cost the same in an airport as in the city?

Dr Alan Rodger,

Clairmont Gardens, Glasgow.