Pull in and use ratings and other metadata from the BBFC
(I suggested the BFI before - I meant the BBFC - they have a great deal of age and content related info and as far as I can tell it's free to use) https://www.bbfc.co.uk/what-classification/what-bbfc-ratings-info
Do any of these services have public APIs to get this info?
David Russell Brake commented
I dont know how to verify short of emailing them but this certainly suggests there is an API https://www.zodiacmedia.co.uk/our-work/bbfc