I have received unconditional offers from Bath, Durham and Cranfield for Msc Management courses. They all have good rankings and international mobility.

Which one should choose I want to peruse my career in UK iself.

I guess you have seen this? https://find-mba.com/board/general-forum/best-msc-mim-degrees-for-international-students-placement-52915 

If you think those three all have good mobility and employment you need to take a closer look at the data: http://rankings.ft.com/businessschoolrankings/masters-in-management-2020 

From that ranking, Cranfield is the slight favorite over Durham but I would not say that any of these schools are particularly notable for great career outcomes. Did you  - or are you planning on applying to LBS?