The November 2013 British National Formulary shows what I think is a further increase in the NHS cost for Liothyronine (T3):
Liothyronine sodium (Mercury) Prescription only medicine
Tablets, scored, liothyronine sodium 20 micrograms, net price 28-tab pack = £68.20
[ Edited 22:31 07/06/2017:
As this thread is now over four years old - I shall now close it to replies.
The subject is still interesting and topical but it would be better to continue discussion on new, or at least more recent, threads. ]