Hope this is of interest:
University Lectureship in the Department of Politics and International Studies (POLIS)
Salary: £36,862-£46,696 per annum
Applications are invited for two University Lectureships in International Relations in the Department of Politics and International Studies, from 1 October 2012. The Department’s intention is to appoint in the areas of security and of foreign policy. We expect at least one of the appointed candidates to have a regional specialism, particularly in relation to Europe, the United States, or Asia.
The UK system works differently from the U.S., as far as I understand it:
Lecturer (similar to assistant professor)
Senior Lecturer (similar to associate professor)