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 prudent you are. Your money earned in Poland buys less than in UK. Housing quailty is better, weather is better, luxury and branded items are more expensive and less choice. It will be a culture shock for you at first , totally different mentality and lifestyle. Keep ur flat back home and let it out. Savings around 5k GBP should be sufficient to start with. Start applying for jobs while you still in the UK.
Written by Polish national who used to live in UK for 8 years.