A mock? No, a draught. The purpose of confirmation is to conform , an error, confirm, wait, that you are continuing to work , yes, on, it, a, at the appropriate doctoral level and to provide assurance that if the work on the thesis continues to develop satisfactorily, then consideration of submission within the course of three further terms would appear to be reasonable. The General Regulations for confirmation of status are set out in the Examination Regulations, along with information on Special Regulations for particular subjects. Course handbooks also provide information on the process.