Ok, thanks - I'm definitely willing to look into used gear to stay within budget, though then it's a matter of waiting for one to turn up.
Any opinions on the Vox Li'l Night Train? The head + cab bundle seems to go for under £250, so it may be worth looking into.
Also Laney LC15s seem to turn up secondhand quite frequently, anyone got any experience with these?
I will definitely go into some guitar shops and try out what I can - though the local shops seem to have loads of Blackstar and Marshall amps and not a lot else.