No, you are not permitted to do paid or unpaid work for a UK company or as a self-employed person. Certain business activities like attending meetings are allowed.

There is no specific amount. You must prove you can cover all reasonable costs for your trip, including travel, accommodation, and daily expenses, without needing public funds.

While not mandatory, an invitation letter from a family member, friend, or business contact in the UK can strengthen your application by clarifying your purpose of visit.

Standard visitor visa applications are typically processed within 3 weeks. Priority services may be available for a faster decision.

Generally, no. You are expected to leave the UK before your visa expires. Extensions are only granted in very limited and exceptional circumstances.

Yes, you can undertake short courses or recreational studies for up to 30 days on a Standard Visitor Visa, as long as it's not the main reason for your visit.

The Business Visitor Visa category is now part of the Standard Visitor Visa. You can use a Standard Visitor Visa to conduct permitted business activities.

There is no right of appeal for a visitor visa refusal. You can either re-apply after addressing the reasons for refusal or, in some cases, apply for a judicial review.

No, it is not possible to switch from a visitor visa to another visa category (like a work or family visa) from inside the UK. You must return to your home country to apply.