How do you find what regulations or other statutory instruments have been made pursuant to a particular enabling legislation in the U.K.?
The statutory instrument search site allows you to do an advanced search for all statutory instruments made under a particular enabling act.
Some statutory instruments are not properly indexed in that database, so you would also want to do an advanced search for the title of the enabling act at https://www.legislation.gov.uk/search. E.g. here is a search for all secondary legislation that contains the phrase "protection from eviction act".
The statutory instrument search site might be underinclusive, while the legislation.gov.uk/search results are usually overinclusive.