Please look on the DCA Cave Registry (has mines too!) when you make plans and check the access situation for your intended trip. There are a few Covid-19 related access changes from the 'normal' state of affairs. https://peakdistrictcaving.info/home/the-caves
At the time of writing this post, the current list of closed sites are as follows:
Ashford Black Marble Mine
Holme Bank Chert Mine
(Note that there are specific Covid-19 requirements/restrictions for trip in P8, Bagshawe Cavern, Watericicle Close Cavern and Peak Cavern)
Please bear in mind this list may go out of date quickly, so check the DCA website before your trip - www.thedca.org.uk
As ever, only cave if it is legal to do so and you can follow all the guidance set out by the Government. In all cases be discrete and cave within your ability, as rescue teams will possibly be short handed and delayed in their response times and abilities due to having to work to Covid-19 guidelines.
Stay safe - The DCA Team