HI there
OH is a teacher, who come here with four years experience on top of his PGCE. He just used a standard CV that listed his educational achievements and employment history and was no longer than 2 sides of A4 long. I would not advise fleshing out your CV to make it any longer than that TBH. I would certainly mention your HoY experience and list any formal training you have undergone but I wouldn't try and make all your PGCE schools look like 'jobs' - you don't need to. You could mention them under your 'educational' background as part of your PGCE - maybe they demonstrate your ability to adapt to new circumstances, to fit in a be partof a team etc. etc. TBH as an English teacher I think you will find a job with the experience you have, so don't worry about appearing inexperienced. Better to be honest about it IMHO. Good luck with the applications - a lot of schools will be advertising in the next couple of months.