On 16/04/2018 20:10, F wrote:
I've some downlighters set into a plasterboard ceiling and the wire
springs which hold them in place have damaged the plasterboard.

How do I repair the holes? Are there any inserts available that would
slide in?


There are inserts available.
https://c-fix-downlighter.com/
https://www.downlightsdirect.co.uk/jc94183wh.html