If you go through the whole application process and find you have been successful, you will then start either full time, part time or casual employment in London. This can be as daunting as it is rewarding, as this is what you have been waiting for since the very beginning. When you start your job, you should make an effort to be punctual, smart and well groomed.
You should make a concious effort to learn as much as possible and stay enthusiastic. This attitude will reflect well on your overall performance and really show your employers that they made the right decision by employing you.