However, I have found the cheapest way to buy them is in bulk on eBay.
Thank you kindly having just spent £9.82 on 24 packs of orange Dextro tablets on there from your heads up.

Now why didn't I think of that....

Edit, back in days gone by Mars bars were the turn to thing for hypos, but being on your own with 2 young kids who would pinch and eat them without a conscience made me find stuff others don't like....