On Wednesday 22 April 2020 the National Archives announced on their website the following:
“We are making digital records available on our website free of charge for as long as our Kew site is closed to visitors.
Registered users will be able to order and download up to 10 items at no cost, to a maximum of 50 items over 30 days. The limits are there to try and help manage the demand for content and ensure the availability of our digital services for everyone.”
To see the full announcement go to the National Archives website