It has been agreed that Anaesthesia in London will operate within two units of application. The London region as a whole is split for IDTs into 2 regions, North (containing the NC, NE and NW regions) and South (containing the SE and SW regions). If you want to move from one programme in ones of these units to another one IN THE SAME UNIT (i.e. NC to NE), you would NOT have to do this under the IDT procedure. This instead would be agreed between the two TPDs in question and sanctioned by the Head of School.
However, if you wish to move from a programme in one unit to a programme in ANOTHER unit (I.e. NC to SE) then you would need to do this via the IDT process.