my understanding is that it is OK to see independent gals who advertise on line at their locations; and I think it is also fine for them to come to your hotel, or home.

Dear Solid Snake:
Go up on some of the prostitution websites for Canada. Being since part of Canada is British some of the constitution would be written similarly and they would have some of the same laws or those that would be close in language. In fact if you do go on those websites you would find some of the same legal issues that they would have in England? Thus if you do your research on Canada with respect to Public Policy you would have your answers in a lot of cases about England.

Outcall in U.K (and Canada) totally legal as in most all the world except the U.S.

Incall in the U.K. is limited to one gal per flat.  Lots of attempts to change that so gals can work together for safety etc.

In Canada bawdy house law makes incall illegal but very rarely enforced unless under age or some real crime in most cities.

Street solicitation (or in public place) illegal but no problem soliciting by phone, newspapers, websites etc. In the U.K. phone booth escort cards are an issue and a nuisance.

Pimping illegal but agencies have no problem since they sell time not sex.

Some cities in Canada require escort licensed such as Edmonton but rare.  Don't think any license needed in the U.K.