As of today there is a new form to use to make a claim for New Style CB-ESA.
It's called a NSESAF1
You can download it from here:
https://www.gov.uk/government/public...esa-claim-form
There is one to fill in on screen, or one to print and use a pen.
You cannot post it. - You will need to make an appointment at the Jobcentre and take the completed form with you to make a claim.
The phone number is on that webpage and the form.