If you have overstayed in the UK, you will need to try and regularise your status at the earliest opportunity, either by leaving the UK and reapplying in the proper form, or using the discretionary measures that may be available.
This guide looks at some of the past concessions - popularly referred to as amnesties - and at ways that someone who has overstayed may be able to help regularise their stay in the UK.
DISCLAIMER. Immigration law is a complex matter. This guide should not be relied upon as a repacement for legal advice from a competent and qualifiied practitioner. The writers accept no responsibility for sole reliance on this guide as a means of regularising status.