UK university salary scales confusion -- advertised job pay seems very low, any ideas why?
In post-92 universities, Lecturer and Senior Lecturer together form the same salary range as a Lecturer in a traditional (pre-92) university. A Principal Lecturer in a post-92 university would have the same salary as a Senior Lecturer in a pre-92 university. Some universities in the UK also operate Assistant and Associate Professors, which further complicates matters. 

A more meaningful description is the Grade:  Grade 7 for entry-level Lecturer, Grade 8 for more experienced, Grade 9 for Senior(pre-92)/Principal(post-92) and Grade 10 for Reader.