Good modeling agencies in the uk?

I really want to do modeling, but dont know if im pretty or skinny enough.
Do you know any good modeling agencies?

You dont have to be 'pretty' to be a model. you just mainly have to be photogenic.
use the phone book love

Do you already have a portfolio together of head shots & other work?

If not, seriously...start there. Otherwise, no agency will take you seriously. To get a modeling job, you need either *training* OR some kind of portfolio that says you know what you're doing.

If you have neither, try doing some work for free for local firms to build up your reputation & portfolio, *then* start contacting agencies.