Update

Bought the pop up tent but didn't get round to trying it out before I went ( two days sat about in shock because someone was actually going to sell me their house ).

Went off to Dulverton ( see thread above).   Tent easy to transport on the 5 buses .   Popped up without any trouble.   One mild night, one very wet night, one cold night. I had a foam mat and a separate groundsheet ( which I didn't use).   No Probs at all but would be concerned if there was a high wind.   Managed to fold tent back up without too much hastle and made it back to sheffield ( 4 buses and a taxi).

Certainly can recomend it for this type of event.

Thanks for all the advice
J