My Weather blocks are not showing up

Hi,

I have been running Google Weather on my site for a while now (lots of places, so blocks on specific pages). Suddenly they don't show up. They are still on the blocks list and configured in the same way as before, but no longer appear on the pages. I don't see wither the headings or the weather forecast itself. Any idea what might be happening (or what more info I can give)? The site is www.localtennisleagues.com and a typical page which would have shown the weather (in the left sidebar) http://www.localtennisleagues.com/bristol

My problem may not be to do with Google Weather itself - but any pointers would be appreciated.

Many thanks

Nigel