Click on the link here to see the latest UKVI approved list of English Language Tests that meet the Home Office’s requirements from 1 July 2014

You'll see all the test details with links to the various providers websites and to the test centre locations.

Do be aware that currently, although the entry level is A1, the level needed for ILR (settlement) is B1.
If you can stretch and reach for level B1 it will be a good advantage later down your immigration journey.