I recently came online and see that your question about Basil hasn't been answered. I'm so sorry that you've had to wait for a response, but if you still need assistance, I'd like to help if I can.
Thank you for all the information. He seems to have recovered and seemed to have benefited from a smaller space. I have also mixed water in with his food which I think has helped. I think he has the same symptoms but that this is now happening periodically. So careful monitoring and awareness of all of the above has really helped. I think if he has the same symptoms again at the same time, I will take him in to the vets surgery as the points in the email seemed to match his symptoms. I was slightly worried that he had been injured outside so I will keep monitoring him as dementia and diabetes also seemed to fit the description last week. I think at this stage it could be on/off dementia however he has currently recovered so thank you for your time. I will take him in if this all happens at once again. He has now been well enough for a bath and I aim to keep him indoors as much as I can, for a little while.
Thank you again for your reply.