British Citizenship appointment cancelling and rescheduling

[Hars]

Hi,

I’ve applied for British citizenship through the online portal for myself and my wife on the 13th May 2019 and got an appointment date of 11th June 2019 from UKVI at Birmingham.

My wife was due for delivery of the bay on June 25th, but she had to undergo a C-section due to an emergency condition on May 20th and both the Baby and mother are now in the hospital. I’m not sure when they both will be discharged as the baby has to gain the necessary weight for that. So I’m doubtful whether We both could attend this appointment on the 11th of June. Can I cancel this appointment and reschedule it for another day? What is the maximum limit of days from the cancellation to the new date?

Regards,

Harish