Hi Harry,
This is just the most miserable, fickle, degrading disease ever!!

But you are living proof to the question posted here about the worry of a spouse bailing out when the other has MS. I admire you and the love you have for Marg which includes the bad times along with the good!!!
Mine left the first year I was diagnosed, 1990, but with some ingenuity, I've managed alone and now am SPMS. There were other extenuating circumstances involved too.
Have the two of you thought about trying Aimspro? You're in England, right? I believe it's available there on a patient-by-patient basis with a script from your doctor. It's another "alternative" like Procarin -- I'm doing LDN myself. I find it so ironic when the docs are unwilling to give these a try because they haven't gone through the "Trials". Well, we all know what happened in the case of one of those "tried" drugs and the possible side effects from the rest are enough to turn your hair gray right on the spot! Guess it all comes down to $$$$.
Anyway -- God Bless You Both and we'll keep praying for that magic pill.