The nutritional information on the pack gave the following;

Per 100 grams

Energy 2247 kJ / 539 kcal
Protein - 14g
Carbohydrate - 42g
Fat - 35g

The Mainstay ration nutritional information is slightly more difficult to read but for the following 216 (250 gram ??) / 1200 kcal pack



Protein - 4g
Carbohydrate - 57g
Fat - 29g

These figures are for per 100 grams


So the fat content of the Halva is only slightly more than the Mainstay ration. The Mainstay ration of course has a much longer shelf life and is said to be non-Thirst Provoking.

Perhaps the Mainstay ration would be be suited to hotter environments where water may be at a premium and the Halva suited for colder wetter environments where a slightly higher fat and protein content is acceptable.

Then of course there is the famous Kendal Mint Cake.