sophie: This evening I've been getting the message on my ipad using safari and wireless access to internet.
if there's any advice on how to solve the problem on the ipad please let me know. Thanks.
I came back to this thread to let you know that whilst at the cinema, attempting to have a look at the message board prior to the start of the film, I received the Forbidden message for the first time on my phone. Launched the browser, clicked settings, clicked clear all cookie data, found myself back in business as quickly as I had been out. Whilst previewing this post, I noticed that I had not posted the information I had Googled in response to your quoted request above - sorry about that! ops:
Clear information from your device
To clear your history and cookies from Safari in iOS 8, tap Settings > Safari > Clear History and Website Data. In iOS 7 or earlier, tap Clear History and tap Clear Cookies and Data.
To clear other stored information from Safari, tap Settings > Safari > Advanced > Website Data > Remove All Website Data.
I hope this information resolves the issue on your iPad.