The thing I have found in most of Europe, is that in the countries where it is not 'advisable' to drink the tap water, it is usually sweltering and a chilled bottle of mineral water goes down a treat and is a fraction of the cost of UK bottled water.

Having said that a lot of the countries where we are advised not to drink the water,it is not beacuse it is unclean, but because it is rich in mineral and can upset our delicate tums.

It sounds as though martin stuck to the big touristy cities and would accordingly pay touristy prices.