Call at weekends from HO

Hi there
I have a question
As I'm sponser of my wife and daughter and have applied at the end of April
Today(Saturday)missed a call from a private number).
Wondering could it be from HO?
Do they call on weekends?
Any idea or experience please

A 'private number' call can be anyone, PPI, bank, insurance, marketing call etc. No one can tell you who it may or may not be.

they will call only on working days not weekends

Thanks
Was wondering whether UKVI call at weekends or not.
Thanks