Yes it's true. I recently was dismissed from my job and it was because I was not hitting targets and my admin was not up to standard. So they did dismiss me.

Furthermore, l used my work laptop and must of signed in my as site and clearly saved my password for easy access.
Recieved a call from the agency to say they have found out I'm a call girl and they can not work with me again.

 
I did not say anything, changed my aw password and took off my picture.

Please give me advice, can my employer go to the police about this at all? Can they do anything about this?

Why would the police be interested?

It's not illegal to have a profile on AW so don't worry.

It isn't illegal to be an escort, nor is it illegal to be an escort at the same time as working a normal 'civvy' job in the UK so they would have no reason to get the police involved. It may be worth contacting ACAS (Have a google. They are an organisation who offer free legal advice for employment disputes) I have called them in the past when I was going through a redundancy in a previous 'civvy' job and they're really helpful.

Okay thankyou guys, I did not show my face but they managed to get into my whole profile,  seen videos of me etc like I said I've changed the password so if entered again they would only get the front page due to the link saved on the laptop.  I was really thinking if they gave any saved content as I was using they're laptop to the police, could they do anything in that way??

I'm sorry that this has happened, it must have made you feel awful and my heart goes out to you.

It's not illegal to be an escort in this country, or to have an AW profile, so the police wouldn't do anything.  They won't go to the police anyway.

Having said that you have put yourself in a dicey situation - most companies/agencies have in their contracts that you can't use laptops etc. for personal use, and those that don't will not allow the use of sites like AW.  Even if the company didn't show your profile, the fact that you accessed AW will probably be enough for them to not work with you.  I'm 99.9999999% sure it will be gross misconduct. 

Even if you appealed and won - all they have to say is that no assignments match your skillset, and not give you any work. 

You're reference is likely to just confirm your dates of employment, as they can't give you a bad reference.....however what they don't say in this situation is more important than what they do.

Sorry I can't post nicer advice.   I hope you're OK.

I never save the password for AW or my own website on any device including PC and laptop, just not worth the risk of someone else accessing - and all my devices are password protected with a password which is not shared.

Wait.. If they "fired you" because you were running your own business (nothing to do with your office job) from the company computer while on work hours then yes... they have a point I'm afraid as that's obviously a big no-no in any job. However... if they fired you because you were dating guys in exchange of money, perfume, diners (select your favourite thing) that's really your private life and as long as it doesn't interfiere with your job it's absolutely none of their business and they have no rights.
 I believe the best strategy in your case is to tell them that a bitter ex created that profile as revenge ("porn revenge", it's very common these days) and keep a high chin.I'm saying because if this issue ever pops up in another interview (rumours travel) just put a teary eye face and throw in the revenge porn thing. Never EVER admit because this issue can really interfere in your civvie profesional life.

Even if you'd been an exemplary employee using the company laptop is a big no-no. But there's nothing they can do now they've fired you anyway. Just hopefully word won't spread outside that single company.