Coming to the UK on the business visitor route depends on what business activities you want to conduct your time in the UK. Multiple visas are allowed in this category, however maximum allowed to stay in the UK is no more than 6 months within a rolling 12 months. Visa Nationals, who want to travel to the UK, would require an entry clearance.

However as a non-visa national, permission to come for up to six months is not needed as a business visitor.

If you are an academic visitor and want to come for more than six months, you will need permission to come whatever nationality you are.