I've been on an insulin pump since 2003, and I originally received funding for the consumables only and not the pump itself. After a couple of years arguing my case with the PCT, and with the help of my local MP, they finally agreed to fund the pump as well.
However at the time of moving onto the Omnipod I was only 2 years into the 4 year cycle of my latest pump. My consultant (at Barts Hospital) approved the change of funding due to the absorption problems I was having, and to be honest this all went through with no issues whatsoever.