I've lived in Mexico for over three years, and wish to return to the UK permanently as my wife and I are separating. I have an FM2 that expired at the start of January - to renew it I need to make a tax return, then show this to immigration, then pay 3,000 pesos to have the FM2 renewed. My question is, can I just return with my UK passport or will I be stopped at customs because my FM2 is expired? The last time I left the country was 2 Xmases ago for 2 weeks. We can't afford the divorce just yet!