Locked out of gmail
 

I cannot get into my brothers gmail account because the verification phone number is no longer available and there is no alternate email address. I need to use gmail to reset the windows 10 password which has quit.
Any help appreciated...

Yes quite a disaster, try setting up an alternate email address and send an email
from it to your brothers locked email, in the email mention the phone number of the "lost" phone and also the number of the new phone that you have got for him. (your phone).

Google read our emails so wait a day, try contacting google to try and get the account unlocked tell them the phone was lost, see if they text the new phone with the details.

Good luck, you may be trying for a few days, let us know if this works.

see if the following helps

https://support.google.com/accounts/answer/7299973

Thanks all,
I resolved the problem by clearing the windows password which gave me access to the gmail account.
The issue now is the phone number (deceased sister in law) does not exist. I guess I need to change the confirmation number to my brothers one