Hello samtheman,
Moving to Poland is certainly worth considering. If it comes to finding a job everything depends on your proffesion. The biggest job markets are cities Warsaw,Krakow, Wroclaw etc. However Its much more difficult to find a decent job in Poland then in the UK with salary nowhere near those back home. In my opinion you should reject everything below 4.500 kPLN net in Warsaw, Krakow and below 4k PLN net in other cities for a start. To rent a flat u will need roughly min 1,8 - 2 kPLN in WAW or KRK or 1,5kPLN elsewhere. Providing both of you work its not bad but it depends how prud