Hello and thank you for your enquiry,

You asked about a disability badge. I think you are referring to the blue badge scheme. You have to apply for this from your local council. There are specified criteria which are listed on most councils websites or you can call them. Citizens Advice have information on their website

Most disabled toilets are not locked these days. You can buy a universal disabled toilet access RADAR key from Age UK charity, Amazon, and Disability Rights UK online store

I hope this helps,

Best wishes,

Vanda