I'll try to clear some queries here.
DM is Deborah Marshall. LB is Lisa Brown. VM is Victor Morey.
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So the list of methods to get birthdates and star signs. Talk about stalking. You would have to find some girls and then start gathering information on each of them. You could probably hang around the Conti and watch for girls who attend regularly. Then, if you can't learn anything from talking to them, look through all those other sources of info mentioned, following them, crossing girls off as they fail your criteria till eventually you narrow it down to a couple. Then you go back one night to see if they turn up so you can abduct them. And maybe that's why there have only been three girls seperated by periods of time. Because of the time required to research each girl.
But I have mentioned previously that someone like a bouncer or even a pretend cop could learn everything they want about a girl by asking to see her ID. But, as with the guy asking for star signs, people will remember a bloke going around asking to see IDs.
Remember, SS chatted to one of the bouncers, because she knew him, on the night she disappeared.
The cops have got it wrong on their page about DM. I actually wrote to them with references to prove the dates were wrong and they told me that the data is loaded by a volunteer and they would get it fixed. That was eight years ago. Also not mentioned about her is that she was supposedly wearing a very valuable necklace when she left home, but it couldn't be found after the fire was put out.