nowadays ketamine is normally diverted from pharmaceutical use in foreign nations such as India (where there are less checks and balances) rather than within the NHS.
Whilst diversion from NHS and other UK sources did happen, particularly before the stuff was class C, My younger sister once worked in a NHS pharmacy not too long ago (in the same area full of K users) and every drop of the stuff was accounted for. Not surprising though as they were really worried about young student staff getting on to it and fucking their lives up and costing the public loads of money..
