You can apply for a Temporary Work—Government Authorized Exchange visa if you:
Want to come to the UK for a short time for work experience or to do training, an Overseas Government Language Programme, research, or a fellowship through an approved government-authorized exchange scheme?
Have a sponsor
Meet the other eligibility requirements
How long it takes
You can apply for a visa up to 3 months before the day you are due to start work in the UK.