Awhile ago I noticed that I couldn’t see the body of my emails when using my browsers (firefox or chrome) when in GMail or VirginMedia email (it’s the same service). It had been bugging me because to read the mail I had to hit reply.
As it turns out, Ad-Block Plus causes the issue. Apparently it’s FanBoy’s blocklist that causes it. Easiest thing to do is just disable AdBlock for these sites and then voila, all working again.