Hi
Ive only been on a sliding scale at point of diagnosis and If I ever need to go into hospital again for diabetes issues directly (ie DKA) then its likely I will be put on a sliding scale as its the only way to tackle something as serious
In theory basal insulin, if its set right, should hold you steady so you wouldnt need it for operations or such like? Also, if its planned stay for an op or whatever - then consultation before then should be undertaken by the relevant docs
However, there should always be someone on call at hospitals who have some knowledge of diabetes in the case of emergencies (my endos are general physicians on call in my local hospital) but I do think they use it as a matter of course at times because most emergencies ARE DKA
As for NHS 24/Direct- its mainly staffed by Nurses, who prob have a general knowledge but prob not even that so I would hope a hospital would be better qualified