Hi all I need to replace the t25 screws that hold the fans to to the radiator. I know it’s a t25 head but I do not know what size or where I can get them. Can someone help?

Looks just like an undertray or wheel arch liner screw, try those as search terms.

Undertray/wheel arch screws are 4.8x16mm t25 domed head with an included washer.  Part number is N90648703, and a quick search with your favourite search engine will bring up many options.  I would check the thread length of the ones you need before ordering in case they're any different.

 

When you're next at a scrapyard, do what I do, go wrong and take as many as you can off Octavia's and Golf's so you've got plenty of spares!

I found mine on e-bay but I think they came from Germany.