"complexity and customisation"
Didn't he anticipate that the applications might be complex and require customisation then? What sort of idiot is he, FFS! Clearly a big one, pulling down a big salary with big perks - unlike most NHS users!
Perhap, and this is only a wild thought, some of the complexity and customisation requirements might have been evident during the requirements gathering phase - or didn't they do that bit? If they did and missed them then there is definitely no hope that the project can have a realistic budget and timescale now. If they didn't then charges of gross incomptence are approriate for Civil Servants and failure of "duty of care" for the suppliers.
But, hey, it's only taxpayers money for a gilt edged solution not appropriate to the problem so let's raise some more taxes. Trebles all round.