Information on the official GOV.UK website:
If your 30 day visa to travel to the UK for work, study or to join family has expired, or is about to expire, you can request a replacement visa with revised validity dates free of charge until the end of this year.
To make a request, contact the Coronavirus Immigration Help Centre. You’ll need to include your name, nationality, date of birth and your GWF reference number with ‘REPLACEMENT 30 DAY VISA’ in the subject line. If you’ve already contacted us about this, please let us know in your email.
You’ll be contacted when our VACs reopen to arrange for a replacement visa to be endorsed in your passport. Your replacement visa will be valid for 90 days.
You will not be penalised for being unable collect your BRP while coronavirus measures are in place.
This process will be in place until the end of 2020.
We at Visa Box will continue to closely monitor the situation and we will update our clients who have been affected if circumstances change or new information becomes available.