To seal your record you will need to go to the Police National Computer (PNC) website. Once there, search for your case using the number given at the time of arrest. Select the 'View Case Details' button and then click on the 'Request Sealing' option. You will then be taken to a page with all the information about how long it will take for your record to be removed from both the PNC and the Criminal Records Office. There is no guarantee that your record will be removed within this time frame but if you do not see any reason why it should not be able to be removed then there is no harm in applying. If you are interested in having an arrest or conviction removed from your record, especially if it is old news, it is best to check with police forces in your area first as some may have their own procedures for dealing with such requests. However, if you cannot find anything online then you can send in an application to have your record sealed.