Transformers are available here. One caveat, though, is the frequency. Anything that runs on a synchronous motor (clocks, turntables, etc) will run 1/6 slower than usual. Fortunately, turntables went the way of the dinosaur (pretty much) and clocks are relatively cheap here ;-)...

Stuff that uses a AC-to-DC power converter (laptops, most rechargable devices, etc) will have no trouble at all. In fact, a lot of the AC adapters that come with such devices these days can be used with anything from 100V to 250V.

Devices which receive broadcasts are dicey (as mentioned earlier in this or possibly another thread). Phone stuff is generally OK (at least with US-based stuff -- I would imagine UK uses a similar analog phone standard).