I’m in London and most disabled bays outside property are free for anyone to use.
you do have the odd one where it’s a permit disabled bay but I find they are usually outside hospitals.
If a bay is free then use it, you need it as much as the other person who may need the space otherwise you wouldn’t have a badge in the first place.
If you visit someone all you have to do who the bay is used by and if it’s ok parking there and they will give the answer