Welcome. You have come to the right place for help & support. This is a great site and a wonderful group of people all who have been touched in one way or another by this awful cancer.
I can only tell you what I have learned from my experiences. In my husbands case, his first symptoms and ultimate diagnosis came at a point when the cancer had already invaded most of his bile ducts. He also was intrahepatic and was inoperable. They only thing they were considering was some type of pallative chemo that ultimately was not possible because his condition deteriorated so quickly that his body was no longer physically in any condition to undergo any type of treatment.
That was our situation. Others have done much better. Everyone's cancer and situation are different and what does or does not work for one may be the opposite for the next person. I guess her condition and the progression of the disease will be the deciding factor in treatment.
At this point I would suggest getting other opinions as soon as possible and then make your decisions based on what you learn and what your Mum feels is best for her.
There are several people on board from the UK and I am sure you will be hearing from some of them shortly. They may have some suggestions as to where to go or what to do next.
This disease is so very unpredictable and does not play fair, so whatever you do I would do it as soon as possible.
I am glad that you found us but sorry you have a need to be here. I will be hoping for the best for your Mum and you. Please stay in touch and know that everyone here is more than willing to be here for you with advice, comfort, support and even just to lend an ear when you need to vent your feelings.
"One Day At A Time"