There are many sites, individuals, institutions which provide Classics resources. The following is a selection. If you would like a link to your own website to be included here, contact Steve Jenkin.
Hellenic Bookservice (Monica Williams)
http://www.hellenicbookservice.com/
Bloomsbury Publishing
https://www.bloomsbury.com/uk/education/secondary/classics/
Latin/Greek A Level Texts: https://www.bloomsbury.com/OCR-editions
Classical Civilisation GCSE: https://www.bloomsbury.com/class-civ-gcse
Classical Civilisation A Level: https://www.bloomsbury.com/class-civ-as-a-level
Ancient History GCSE: https://www.bloomsbury.com/anc-hist-gcse
Ancient History A Level: https://www.bloomsbury.com/anc-hist-as-a-level
ZigZag Education Guides
https://zigzageducation.co.uk/synopses/4352-Latin-GCSE-OCR-Set-Texts-Prose-Verse?pid=5286
Terry Bird Running Vocabularies
http://www.tabclassics.uk/
Classical Workbooks (David Carter)
http://www.classicalworkbooks.co.uk/
or
http://www.classicalbooks.co.uk/