These days a catalogue of academic qualifications and previous posts followed by a couple of referees and a couple of hobbies won't get you anywhere. Even if you do have total recall of your O-level grades and now defunct examining boards. A CV should be about two pages long, personal without any hint of navel-gazing. Its purpose is to get you an interview so it needs to be interesting. But the debate can wait until you meet the panel.
Heads are busy people.
They may ask you to fax your CV, and they will want to photocopy it for every member of the interview panel, so keep it short. It should be clear too, with no fancy typefaces or distracting design. Personal profile - Under your name you should start with a personal profile. A two-sentence paragraph is enough to give a flavour. Say what you did in each job.