This Work permit visa is initially for 3years and you can extend 2 more years i.e. a total of 5 years. So that you can eligible for ILR (Indefinite Leave to Remain) i.e. PR(Permanent Resident). Skilled Worker Visa has replaced the Tier2 (General) work visa. A Skilled Wok visa legalizes you to come and stay in the UK to do an eligible job with an approved Employer. The UK is looking for skilled professionals to work in the UK under the Tier2 Visa Program.