To live and work in the UK, most non-EU nationals will need a current UK visa. There are different UK visas, work permits and passports that will enable you to legally live and work in the UK. The major Visa entry routes for antipodeans, Australian, New Zealanders and South Africans are listed below, each of these have their own eligibility requirements and restrictions.
This website has a Visa Assessment service where you can fill up your information and assess your eligibility for these visas. This is a worldwide service, meaning that you can search visas not only for the UK but any of the countries covered depending on your situation and requirement.
The new UK immigration cap means that only 1000 visas will be granted from April 2011 to April 2012 under the Tier 1 Points Based System.