If you are interested in a trainee trader position I hear Xconnect Trading are currently recruiting. They only take on a couple of trainees per year and have one to one training.
Atlas are also have a very good trainee trader program with a good success rate.
Personally steer away from the bigger houses, especially if they are taking on large numbers of trainees, these tend to be "mincing machines" taking on 25 trainees hoping two or three make it.
Training should always be free, dont go anywhere that expects or requires payment or for you to put up trading money (especially if they are not FSA registered)