My friends had to subsidise the cost of running my vital oxygen therapy

Running an oxygen concentrator in the long term was crucial after a double lung transplant. Photograph: ACORN 1/Alamy

I am dependent on long-term oxygen therapy after a double lung transplant.

I’m entitled to reimbursement of the excess electricity used by the oxygen concentrator and have received quarterly payments of about £48 from Vivisol, which administers rebates on behalf of the NHS.