Error 503 – service temporarily unavailable

Hi there,

First time using the forum so I hope this works! I have a live site (www.hdgeothermal.co.uk) which wasautomatically upgraded to the latest version of WP. Since then, I have been unable to log in, and get the ‘503 – service temporarily unavailable’ message. I have two other sites, which are not yet live, which have both been updated too, but I can access those with no porblem. I have asked my host to check the server as I understand it may be a server issue, but as he hosts all three sites, I would expect all three to be down. Does anyone have any other suggestions I can try? BeccaT