An important first step if you intend to work in London is to obtain your right to work in the UK. For detailed information on visas and immigration please refer to the GOV.UK website, but here is some basic guidance on the more common visas that are used:
If you are lucky enough to obtain a British passport then you do not need to worry about a visa and you are eligible to work in the UK for an unlimited amount of time.
EU Passport Holder
An EU passport holder can work freely within the UK without the need to obtain a work visa.
Youth Mobility Scheme (YMS) Visa
Also known as a Tier 5 visa, this visa allows you to live and work in the UK for up to two years. You can apply for a YMS visa if you are aged between 18 and 30.
You can apply for this visa if you have a grandparent who was born in the UK and this visa allows you to live and work in the UK for up to five years.