Tony
BT Openzone uses The Cloud's network, therefore most of their hotspots are in fact The Clouds network. T-Mobile use their own hotspots and BT Openzones. The Cloud owns and operates the majority of commercial hotspots in the UK.
Where you use your iPhone is a personal preference choice, I can understand if you dont want to use your mobile phone in a pub or bar - but obviously lots of people do.
arkitect
its hard to resolve an individual problem on a forum, but I trust our customer services guys on this if thats where they say the problem is, they have been very on top of any iPhone issues. But I am very happy to follow up and check it out for you though if you want to drop me a mail with the specifics (ticket number would be great if you have one), I want to make sure everybody gets the service they should. I'm on owen DOT geddes AT thecloud DOT net
thanks
Owen