Good afternoon everyone! I'm new here so hopefully I've posted this query in the correct location. I've been having problems with the speed of my WordPress website for about a week now and despite a few attempts by me I've been unable to fix it. Hopefully some of you can point me in the right direction.
What is my problem?
The installation I need help with is located at http://www.yrea.org.uk and runs on WordPress version 3.2.1. The same installation has been here for at least the last 4 months if my memory serves me correctly and we haven't had any speed issues up until this week. But I noticed that loading the website is now taking a very long time. I did a test before I posted this message and it took 1 minute 32 seconds to load our home page. Before, it would take less than 5 seconds. This is a problem that many of the members of my website have noticed, and its starting to really annoy everybody. I'm concerned people won't use the website as much if they're having to wait so long to view its pages.
What have I tried so far?
I've tried a few things to get my website running faster with limited success. At first I thought it might be due to the ads we serve in the top right (which is powered by OpenX) but after disabling these for a few days the site still ran just as slow as before, so I don't think its the ads that are the problem.
I then thought it could be a server issue. My host did a few tests and couldn't find anything wrong but still offered to move my shared hosting account to another server to see if this helped. Unfortunately the speed is still just as slow as before even on the new server.
So, I need your help.
What do I try next to try and make WordPress speed up again? Thanks in advance for all your help, I look forward to seeing some replies.