Please help Smokey get radio-iodine treatment

Please can you help me get Smokey the radio-iodine treatment he needs to treat his hyperthyroidism at the Hyperthyroid cat centre in Wetherby.
He had the same treatment in 2016 and was like a brand new cat but unfortunately it's come back which is extremely rare and he's quite unwell and losing weight by the week.
He is insured but because they covered his treatment last time they are unwilling to help with the treatment he desperately needs.
He's only a young cat so don't want him to have to be on medication for the rest of his life especially after reading through the horrendous side effects. He's an absolute superstar and is the father to my other 2 cats.
I wouldn't ask apart from my knee joint has compressed and I'm awaiting an MRI and surgery which has been postponed until this virus is under control which could be months away.
I'm self employed and unable to work and in full lockdown due to my father having lung cancer, COPD and angina.
Even if you're unable to donate at this time please may I ask that you share this with as many people as possible. 
Don't know how to thank you enough.
Please stay safe everyone thanks again.