Further to previous communications I'd like to clarify the position regarding informing the HSE that you hold radioactive sources.
We (Kent's H & S dept and myself) have informed the HSE of all schools holding sources where Kent is the employer. Schools where the Governors are the employer (Foundation and voluntary aided + academies) need to inform the HSE individually. We did try to notify them on your behalf but this was not acceptable! The link below explains the categorisation of schools.
http://www.direct.gov.uk/en/Parents/Schoolslearninganddevelopment/ChoosingASchool/DG_4016312
If your Governors are your employers you'll need to make up a letter using the proforma on page 34 of the new L93 booklet. You don't need to list all the sources you have, they just want to know what type (sealed and / or unsealed). L93 was attached to the Kenttrustweb article about this on 4th November 2008 - follow this link and then download the attachment -
http://www.kenttrustweb.org.uk/communication/ebulletindetail.cfm?eb_bulletinid=3153
Once you have informed HSE there should be no more work to do! If you decide to stop using sources and get rid of them, you'll need evidence of proper disposal and / or transfer which should be sent to HSE and to myself and / or the Kent H & S department at County Hall
Please ensure that you complete this bit of record keeping as discrepancies will not look good if HSE visits your school for any reason. Your Governors will be held responsible and they would expect the science department to have this in order. If I can help, please contact me on my e-mail - keith.milchem@kent.gov.uk