Applying for FLR with new company

Hi All,

My current company I work for as a security guard the building which I work in will be sold to a new company meaning management and everything changes so I can't tupee over. If the company decides to keep security I will be under the new companies terms and conditions whereas the company im currently with helped me get my wife her first visa. Although her visa is up until Feb 2018 will this effect:

1. How many wage slips I supply? (Usually it is 6 but I got told if I change company then it will be a full year)
2. Would I need to get extra documents when it comes to applying for her FLR?
3. Although I will use the premium service to find out the answer to FLR, will it make a difference because another company taken over my last one?

Please can somebody help..

Can somebody please help