Work permits must be applied for by the employer and are usually only granted for specific jobs requiring a high level of skill or experience.
Nationals of certain countries can visit the UK for up to three
months without a visa,these are listed at the website of the Home Office UK Border Agency.
If you intend to visit the United Kingdom, on holiday, a business trip, to study, work, volunteer or as an emigrant you should get up to date and accurate information from the official website of the Home Office UK Border Agency.