Well I am from a non EU country,so I needed birth certificate,passport(all pages),my marriage certificate(since we were married before) all translated in polish by a certified translator and some pictures,lol and sme negligible amount in pln as fee:)
Good luck with it all......I am also from UK married to a Polish woman and have been living in Poland for nrly 3 years now. Great place, nice people (but I do live in a village, have a farm and don,t need to work). I have been told that it is a completely different experience if you need to find a job, have to live in a pokey flat with outlaws and god knows how many of their other offspring in a crappy town. But If conditions are right for you it will be a great experience. Weather totally different to UK....winters cold, snowy but dry snow not the wet nasty stuff of UK...summers (especially where I live...South East Poland) long and hot.....bring lots of suncream........unless you are living on the North coast...you will miss the seaside...I do.....got to build that swimming pool I keep promising myself.