Hi carer89
Welcome to the forum.
You might want to have a look at the following FAQ which explains where everything is;
www.benefitsandwork.co.uk/guides-for-claimants/faq/forum We are hearing from the forum members who are having issues with their local authority and renewal of blue badges due to delays in their PIP renewal.
You don't need to be in receipt of the mobility component to be awarded a blue badge, a good doctors letter can be useful.
I am not aware of the DWP issuing letters to claimants during the backlog.
Gary