For your further reference...
The link below contains answers for most of the questions related to Accommodation requirement.
https://assets.publishing.service.gov.u ... x_1_7A.pdf
I see statements as below,
"An application made after the marriage or civil partnership has taken place should not rely on prospective accommodation"
"A house in multiple occupation (HMO) is defined as “a house which is occupied by persons
who do not form a single household”. This covers hotels and hostels, as well as houses lived
in by two or more family units or by a couple (and their dependent children) living with the
parents or other family members of one of them"
From all the info I understand that an accommodation (
not the future booking of a hotel/hostel/B&B etc,.) should be currently available for you (it can be from relative/friends/hotel/hostel/B&B,. etc,.) and it will be an "adequate accommodation" for all family unit. And you need evidence from the owner.
I couldn't find info on minimum validity for rental agreement or hotel/hostel bookings.
If you are taking a rental property it makes sense to have rental agreement for minimum of 6 months as the application processing period itself takes about 3 months.
Please correct me if i am wrong. thanks.