London agency help

Hey everyone!

Firstly, I want to say a huge thank you to everyone on ActorTips who answered my question about being a young actress. All of the comments and tips really helped and I'm so glad that I found this website. =D

Although the response in the forums was great, I never got an answer about any good child angencies based in the UK. If anyone is from here (preferably London) and knows of any good agencies that would take a 15 year old that would be really helpful. I have looked around but the only ones I can find you have to pay for a place, and I know that the only ones worth bothering with don't ask for straight off payment because they take commission instead.

Thanks so much, it will really help me.
Alice