Trying to make citizenship application

Started nearly two years ago!
Got so complicated and expensive that I gave up for a while. Theres now a less complicated route for me but I’m struggling to find proofs of continuing residence over 25 years!
Had cleared out some of the really old EDF bills etc and many years they weren’t available online. So I’ll have to try to find some other (official) type proofs.
Also my daughter being her usual difficult self and I need to photocopy a grandchild’s IDCard