There's info on medical services if moving to the UK here:
https://www.nhs.uk/NHSEngland/About...and/Pages/moving-to-england-from-the-eea.aspx
Hospital staff include endocrinologist (doctor) diabetes specialist nurse.
Freestyle libre can be ordered online but the sensors in the UK may not be compatible with a reader from elsewhere.
Pump supplies as I understand it are ordered direct from suppliers but coordinated through our health professionals.
I pay for medical services through National insurance so don't pay directly.
Hope this helps as a starting point but sure other contributors will be along with more info.
Frances