If you decide to stay in the UK, you should apply for the necessary leave to remain to regularise your stay. You will be able to submit an application from within the UK, whereas you would usually need to apply for a visa from your home country. You will need to meet the requirements of the route you are applying for and pay the UK application fee. The terms of your leave will remain the same until your application is decided. If you are switching into work or study routes you may be able to commence work or study whilst your application is under consideration. You will need to show your application is urgent, for example if you need to start a new job or course of study, please provide full details of this in a covering letter with your supporting documents. You are also able to apply for leave to remain to regularise your stay if you have been issued with ‘exceptional assurance’. You will need to meet the requirements of the route you’re applying for, pay the UK application fee and you must submit your application before the expiry of your ‘exceptional assurance’. If you apply from 1 January 2021, you will need to meet the switching rules of the route you are applying in. This will be based on the last route you were in before you were issued any ‘exceptional assurance’. For example, if you were in the UK as a visitor, you will not normally be able to switch into another route.