The United Kingdom and Poland share some common characteristics in terms of their positioning in geography and demographic modelling. It is the purpose of this paper to analyse where the two countries fit into the mobility transition theory developed by
Zelinsky and investigate the impact of this primarily on the United Kingdom. This will be achieved by analysing the theory first developed by Wilbur Zelinsky and provide a case for its evolution by Skeldon and De Haas before using Poland as a case
study to explain the high number of immigrants into the United Kingdom both historically and recently since Poland joined the European Union through analysing economic and demographic data.