graeme_p - 5:07 pm on Mar 31, 2011 (gmt 0)
I am back in. I got the email today.
Of course I still do not know what the problem was.
Thanks to everyone for their advice, especially HuskyPup who looked at the site and made useful suggestions.
I am going to try and diversify my ads though. Relying on Google this much is too stressful.