Welcome to the site, although I am sorry that you have to be here. I am also in the UK, in Dundee and I was my dads carer during his fight with CC. Please come back here often as you will get a load of support from us all. And I am sure that you will get answers from someone to the questions that you will have.
My dads CC was inoperable and his treatment was PDT with the possibility of chemo at some point. He also had a metal stent inserted. Perhaps you could speak with Prof Lodge about the possibility of PDT as a treatment for your dad at some point. My dad had his PDT at Ninewells in Dundee, but I think they are doing the same treatment as part of a trial in London, Nottingham, Bristol, Liverpool, Wincester, Basigstoke and the North Manchester General. I am sure that Prof Lodge will know more about this.
I hadn't heard of the Bilcap trial until today and I'm assuming that this is the trial that your dad is on,
http://www.cancerhelp.org.uk/trials/a-t … allbladder
As things turned out, my dad was not suitable for chemo but from speaking with his oncologist at the time, if they had done chemo then it would have been the Gem/Cis combination. But I do not know if that is now the standard treatment in the UK, perhaps someone else will know. As to Cyberknife, I think that there is only one facility in the UK that does this procedure, in Harley Street in London. I remember seeing something on the news here in the UK about it last year and I think I posted the link to the piece on the website so perhaps you could use the search function here to look for it.
My best wishes to you and your dad,
Any advice or comments I give are based on personal experiences and knowledge and are my opinions only, they are not to be substituted for professional medical advice. Please seek professional advice from a qualified doctor or medical professional.