When I complained about it. I was told very clearly it will stay on. And just because it shouldn't be information included doesn't mean it won't be. I found in my case it was a human who entered that extra information not a database check for crimes that should automatically show up.
The police say one thing and do another.
Miss Betty,
It is an outrage that this is included in your DBS check. Not that there is anything wrong with being a prostitute or being called a prostitute (of course), but (exactly as you asked) would they have stated your "known" occupation if you were a plumber? Of course not. The fact of mentioning it in your DBS check - and adding the word "known", similar to e.g. "known criminal", is intended to invite adverse inference, and for that reason is wholly wrong.
I would definitely suggest to try to get it removed. I can recommend a (female) human rights barrister who takes direct access cases, is SW-friendly, and who charges reasonable rates, if that can help you with advice, or action?
I am not a lawyer but my firm belief is that you would be successful to have this removed. The police have recently been forced to delete records of "non-crime hate incidents" following a court order. Clearly, being a prostitute is also a non-crime!
Henry