I am now Reader, which means I went through a process much like tenure involving letters from external academics etc. Getting promoted to Reader in the UK indicates that you are very strong in research and are expected to become a full Professor. Lecturers can also get promoted for their teaching and administration: in old universities that position is called Senior Lecturer and in new universities it is called Principle Lecturer. Often people are promoted for their teaching first and then subsequently "translate" to a Readership in anticipation of applying for a chair, but I skipped that step.
I am very glad
to be a Reader now so that people familiar with the American system (or UK new
universities) just have no idea what I am, rather than thinking I'm something