The Times Higher Education website is quite good, as is the Guardian website, although they take a bit more trawling through than jobs.ac.uk. Check whether your own university has a vacancies alert type thing that you can sign up to. For Oxbridge jobs google 'Oxford Gazette' - can't remember what the Cambridge equivalent is off the top of my head, but they list more appointments on there than they generally advertise elsewhere.
also make sure you are subscribed to any listserv/other mailing or discussion lists in your field as sometimes people circulate job adverts through those. If you are thinking about postdocs (as opposed to strictly lecturing posts), try googling 'academic jobs wiki', it is a good resource for current humanities and social science postdocs (although focuses more on US jobs).
Hope this helps (and that it doesn't get moderated into oblivion)