Thanks to the RED CROSS museum I now have the information on the Scotish box. As a bonus they have been kind enough to put in a lot of information of Prisoner boxes issued at POW camps in any one wants it, let me know. The YEATEX mentioned is similar to Marmite apparently.
Scottish Branch British Red Cross Society Prisoner Parcel
Before 1943 the invalid food unit comprised of two parcels. After this time the contents were contained in one parcel. The merger
was effected by cutting out most of the items which were found in the standard food parcel. It also became known as the invalid supplement parcel and became in reality what it was always intended to be, a supplement to and not a substitute for the standard food parcel. Both the invalid diet supplement parcels and the medical units were sent to Geneva for distribution to the camps and hospitals. They both bore distinguishing marks so they were not confused with other parcels.
The contents of the invalid diet supplement parcel were:
Dried milk, 1 tin (8oz)
Horlicks, 1 tin (8 oz)
Rolled oats, 1 tin (5 oz)
Nestles Milk, 1 tin (14 oz)
Ovaltine, 1 tin (4oz)
Fruit, 1 tin (8 oz)
Dried soup, 2 tins (4 oz)
Creamed rice, 1 tin (12 oz)
Sugar, 2 pkts (8 oz)
Lemon curd, 1 tin (8 oz)
Cheese, 1 tin (3 1/4 oz)
Yeatex, 1 tin (2 oz)
Dried eggs, 2 tins (3 oz)
Cocoa, 1 tin (4oz)
Chocolate, 1 pkt (2 oz)
Tea, 2 pkts (4 oz)
There were twenty packing centres in Britain and the Scottish ones were located in Perth, Stirling, Dumfries, Glasgow and Edinburgh.
I have attached further information regarding the other types of food parcels that were sent to prisoners of war and Red Cross assistance to the Channel Islands during the Second World War.
I hope this information is of interest to you.