High travel insurance for an 80 year old who has had bypass surgery does not surprise me in the slightest. Try being a 60 year old who has had a transplant ! Saga and Age Uk in our xperience have proved to be expensive. Eurotunnel insure my friend's parents, both in their mid and late 80's for under £100 and I think that is an annual policy, not a "one trip".
The question however seems to be that the standard rate of VAT is unfair. I would ask Why?
If you subscribe to a method of taxation which relates to the value of the item, rather than the means of the purchaser, this is what you get. To have a sliding scale of VAT might be an answer, but would be a minefield.
If I had to "nominate" 5 items for lower or zero rating, I would prefer to see lower VAT on sanitary products, children's shoes (that may exist, don't know) tradesmen's bills for e.g. Roof repairs, heating and plumbing repairs , meals or snacks eaten "in" as opposed to takeaway food and drink, and public transport costs.
I still think this issue is a non starter and while you might expect members of Gransnet who are presumed to be "d'un certain âge" and may or may not be infirm to support the idea, it is interesting that there seems to be a strong majority against it.