So I now need a calor propane cylinder to avoid paying a calor "refill agreement charge"
I get my propane cylinders (for a motorhome) from a local plant hire company, who only charge for the gas & no rental agreement or bottle rental charge. IIRC it cost around £18 for an 11Kg bottle earlier this year. As I am in West Yorks. the supplier will not be relevant to you, but may be worth making local enquiries ?
Regards,
Nigel B.