The first bit of advice that came into my head was don't go, but that's a little unfair.
Southport is not a bad place when the sun shines but when it comes to parlours I have only ever heard of one. My memory isn't as it was but I think it was called Reds. Part of the lancs massage chain. So at best a one girl operation, but i have to admit i have shagged a number of fitties from that outfit.
Have you tried adultwank?
Welcome to UKP 
Yep, Red's is the only parlour in Southport, I think they usually have more than 1 lady on. It's open 24/7.
As a prossie, I haven't actually visited lol but I believe it's on an industrial estate in Southport and prices start from £55 for 30 mins (before extras). They don't have a website but they still advertise their telephone number online (I would post for you but I'm on an Ipad, google search should bring it up).
There are a couple Independents on AW I think but from reading other members posts, it may help with recommendations if you post your budget (if you have one!) and any particular likes etc.
Good luck, I am originally from Southport. It's a wonderful old place when the sun shines

but I don't recall a massive prossie scene. If you are considering casting your net a bit wider there would also be Preston (not a far drive for a few different parlours) and Liverpool (for more indies).