A businessman was charged at total of £75 for three bottles of water during the heatwave. Edward Heaton was meeting a client at the exclusive Wellesley Hotel in Knightsbridge.
He ordered three 500ml bottles of San Pellegrino - which typically cost 60p in supermarkets.
But when the property buying agent asked for the bill he was staggered to be charged £75. It emerged The Wellesley - a 5 star hotel which charges £600 a night for a suite - operates a minimum charge of £25 per person when using its bar after 4pm.
The water had already cost £5.50 per bottle and there was also a service charge of £8.33. A 'minimum spend' charge of £50.17 was also added, bringing the total to £75.
Edward emailed the hotel to say he wasn't happy with the way he was treated on July 17. He also tweeted his thoughts. The hotel responded by tweeting: