Until the end of March 2011, there is no limit on the number of Tier 1 (General) visa applications that can be made from within the UK. This is now the only way in which you can apply for a Tier 1 (General) visa. Since 23 December 2010 when the temporary limit had been reached it has not been possible to make Tier 1 (General) highly skilled visa applications from outside the UK. However, it is still possible that there will be another legal challenge to the Tier 1 visa temporary limit soon.
Topical: