This can either be a degree at Bachelors Level or higher which was taught in a majority English speaking country (same as list above - except Canada) and is listed on the UKBA points calculator. If it doesn't meet those criteria you need to support the application with a confirmation from UK NARIC to affirm the level they grade your degree course.
Note if you are coming under the Intra-Company Transfer scheme (Tier 2 ICT) then you don't need to prove the English language component as long as your stay in the UK is less than 3 years.
The UKBA English Language requirement for Tier 2 visas
The UKBA English Language requirement for Tier 2 visas is fairly straightforward. There are 3 ways to prove your English language ability is up to the correct standard: graded as level B1 of the Council of Europe's Common European Framework for Language Learning.
The 3 paths are:
Your partner / spouse will also have to pass this criteria to be granted Entry Clearance.
Citizen of a majority English speaking country
These countries are (as of June 2011)
Passing an English language test
The test must have been approved by the United Kingdom Border Agency (UKBA). You can see their list of approved tests and testers on the Home Office website (as of April 2011).
Having a degree which was taught in English
This can either be a degree at Bachelors Level or higher which was taught in a majority English speaking country (same as list above - except Canada) and is listed on the UKBA points calculator. If it doesn't meet those criteria you need to support the application with a confirmation from UK NARIC to affirm the level they grade your degree course.
Note if you are coming under the Intra-Company Transfer scheme (Tier 2 ICT) then you don't need to prove the English language component as long as your stay in the UK is less than 3 years.