I have finally got around to applying for supply work and would be grateful for any advice from those with experience, as I have none. 20 Years experience teaching English in secondary school. Left in September with a CA. Looking for work in Greater London. Only looking for day to day at the moment as I am going travelling in January. I have done some research, but still have many questions, the most pressing of which is DBS. My understanding is that any agencies I register with will have to obtain some notification that I am 'clear,' from the DBS, and that this is not included or implied in the 'reference' from my previous school. My understanding is that either the agency applies for this, which may take some time. Or that I can 'update' this myself, which might speed matters up. I've had a look at the GOV.UK/ DBS update service website which appears to suggest that I have to give an 'application reference number (the "form ref" on your application form).' I have no idea what this is. I tried the telephone only to be told that 'there was no sales adviser available at present,' which threw me a bit. Surely these people are not on commission of some sort?