At last I have got an answer.
I rang my Mums Dr last night and had quite a long conversation with him. (What with the calls to the District Nurses and my sister etc this week my phone bill be the size of the National Debt!!!!)
He was very honest with me and basically said if I want to see Mum while she is still alive I should get home asap. He apologised but I was grateful he had been honest and told him so. I know it isn't set in stone but I feel better now (oddly).
My sister rang this morning and said that Mum had been very quiet again yesterday and not eaten or drunk. This is happening more often now so I will try and organise to get back home as soon as possible. (Now... where did I put that ski mask and address of the bank? ).
missing what has gone and scared of what is to come