Can I switch to a Tier 2 (Intra-company Transfer) visa?
You can only switch to a Long-term Staff Tier 2 (ICT) visa if you are currently in the UK as a Sole Representative of an Overseas Business. There is currently no option to switch to a Graduate Trainee Intra-company Transfer. You’ll have to pay the Immigration Health Surcharge as part of your application.
You can find out more about switching immigration category from within the UK here.