Second the nomination for a Whyte R7. I bought one in the summer,after trying several other makes (though admittedly not the Trek FX) and it is a superb bike. The 42T front chainring is paired up with a 11-52 cassette at the rear so you've a got a gearing range that can pretty much cope with any hills. Its solid, dependable and easy to maintain. There are also mounts for a rack and kickstand. Stick a pair of SKS Speedlockers on, front and rear lights and its all the commuter you will ever need. And don't worry if your commute involves a bit of off road, it's basically a MTB with road wheels.
Depending on the size you can still pick one up for under £1000. Mediums and X large are still in stock at Winstanleys and Balfes.
Rutland cycling had a large in stock when I last looked as well.