Technically the pumps still belong to the NHS but they never seem to want them back, I don’t think they can use them for anyone else if they are out of warranty. Maybe the hospital might take cannulas etc back if someone else uses the same pump? We got rid of a few that way, daughter had just changed to a different pump and we got a phone call from the DSN saying that another family with a younger child had just changed to a new pump and hated it so much that they wanted to go back onto the old one while they reconsidered their options, but they were no longer able to order the consumables from the pump company. Luckily for them it was the same as our old one and we had a whole box of cannulas and at least as many cartridges left over so it was nice to send them to a new home!