The Graduate School has announced that an extension to your completion date may be applied for, if required, as a result of the Covid-19 situation.
You should discuss this with your supervisor in the first instance. You should notify our team as soon as possible so that we can advise you on implications to your Tier 4 visa and sponsorship. Please note, that an extension to your completion date will also mean an extension to all Tier 4 responsibilities and conditions.
More information on this here and the Graduate School webpage.