I'm on a Tier 1 visa for 3 years (extended under the JR) which will bring me to 5 years on HSMP + Tier 1. This is my 3rd year in the UK. I might have to go work in the US for about a year. Is there a way for me to not lose my Tier 1 while I'm away? If I'm away for a year, will it just be a matter of...