Had fitted last year Bilstein B6 shocks,but left the standard springs in as didn't want too harsh a ride. I'm happy with the ride but the shocks lifted the ride height by about 25mm. Just want to loose the 25mm. Is it possible to just change the springs ? Or do I need a new setup ?

You could put 40 mm drop springs on which is what i did on my fabia much better ride. H and r ones really comfy as they are compressive springs

Yes looks like springs are the way to go. Eibach have the smallest drop 25mm. Have had them on a VW so know there ok.