We are so grateful for all your help!
I have now suggested to Mark that we book him in for another B12 blood test to see where we are now.
As he was addicted to alcohol for years, I am wondering if his levels are still rising after being abstinent for 14 mths.
He stopped drinking in July 2010 and his B12 was 202 in October 2010 and had risen by April 2011 to 264.
I will be glad to drop by and let you know how he is getting on
At the moment he is in bed quite a lot as the pain is just to much for him.
I have made a bed cradle to keep the bedding off his feet, but I really cant think of anything else to do to make him more comfortable.

Thanks again, you have given me renewed hope xx