What are the visa & residency requirements in London?

"In order to visit London, a visitor must obtain a visa prior to their arrival. The process of applying for a visa involves submitting an application form, providing supporting documents, and paying the applicable fee. Depending on the type of visa, the applicant may also need to attend an interview. In order to become a resident of London, UK, an individual must apply for a residence permit. The process of applying for residency involves submitting an application form, providing supporting documents, and paying the applicable fee. Depending on the type of residence permit, the applicant may also need to attend an interview. Additionally, the applicant may need to provide proof of their financial means and/or proof of their employment status," said another expat in London, England.