When I called that number (out of hours - see below), it rang and then eventually answered with a DEAD line !?! Funnily, I find that a lot when checking numbers. If anyone has any idea why it does it, please let me know.
Update:
Got a message from Paul confirming that it rang out for him.
When I got through this morning, they can't tell me why it does it either. Maybe something to do with number redirection ?!
So confirmed it's a working number; they're based in Ipswich.
Hours of business (summer)
w/days - 8am to 9pm : w/ends - 9am to 6pm