For those yet to obtain a copy, the rules which come into force on 31st May 2021 are available at http://www.justice.gov.uk/courts/procedure-rules/civil
A pdf version of the relevant protocol is available at https://www.dropbox.com/s/oulfp3hkxvori5k/Civil%20Procedure%20%28Amendment%20No.%202%29%20Rules%202021.pdf?dl=0