As of April 6, Trinity College London and IELTS will be the only two approved providers of Secure English Language Testing used to support UK visa applications, as part of a raft of changes to visa laws due to be laid before parliament on February 26.

There are currently four designated SELT providers, of which only TCL and IELTS, which is jointly owned by the British Council, IDP: IELTS Australia and Cambridge Assessment, may be used to prove English language proficiency in an immigration application once the changes come into force.

IELTS will be the only SELT available worldwide, while the TCL exams must be taken in one of ten exam centres around the UK.
The changed regulations, which follow a tender process beginning in Autumn last year, mean that the City & Guilds IESOL, ESOL and ISESOL qualifications and Pearson Test of English Academic will no longer be designated SELTs.
They also exclude all Cambridge Assessment exams other than IELTS from the list.
However, all currently approved exams taken on or before April 5 will be accepted until November 2015 to ensure a smooth transition.