I Finally got interview appointment for my mother at UK London Embassy in late Jan for her GC, I have a couple of questions:
 
	 
 
	- Do they keep / require UK passport at Interview?  The reason why I am asking is as she has travel overseas following month and is planning a US trip in March.
 
	- There is an option to reschedule appointment, up to how far out can this be pushed back. e.g, 3-6 months.