Reporting a change after the application

[Hammers84]

Dear all,

My parents applied for a 5 years visitors visa a week and a half ago and I have moved home on Friday.

The question is do we have to inform them of the sponsor's address change? If yes, how?

If not necessary, what do I tell them when I receive a call, which could be any day now.

I have sent a copy of the land registry for the previous address(current at the time of applicatiom) I also have solicitor letter etc confirming the new purchase.

Thank you for attention and help.