To make it illegal you would first have to prove it was stolen property, then prove the person who was selling the items knew or reasonably suspected that they were stolen. A charge of Handling stolen goods would be much easier to prove than the theft.
Don't all these tools have a little arrow stamped on them anymore. Then they are stolen cos. the tools were only ever lent while you served and never sold on under any circumstance. Hence if you have an item with a stamp it was stolen back in the bad old days.
Lots of pussers tool are sold as scrap. In the old days they were then sold in surplus stores. If you were serving and bought them (quite legally) you had to retain the receipt or could be charged with theft. After I left as a civie working on ships for british aerospace i always made sure that my toolbox did not hold ex pussers items. try telling the mod plod that you bought them 5 years ago and have since lost the receipt, for some reason they don't want to believe you
Many moons ago when i was at HMS Condor, RNAS arbroath, it was a Tiffy training school, they had their names stamped on all of their tools. If they failed the course, the tools would be sent for scrapping. We had a tame Jack Dusty from whom we would buy the tool box and contents for Thiry Bob, He would deliver them to the station, avoiding the MOD Plod, from where we would collect them take them home and flog them for a Fiver, nice little earner as they say.
A lot of the old surplus clothing was much better than this Chinese crap that is in the stores now. I think at one time half the population had a denison smock or equivelant. Russian spy must have had a seizure!!!
A&N Stores once told me long ago they don't sell ex military stuff anymore reason being it last's to long.
Of course many will disagree with this will they not.
I had a ex Korean padded jacket and it was excellent kept me warm on the farms tractor. What happy days through the window ventilation and that delightful metal seat where you felt every bump and stone and I am sure it was that what caused my bleeding piles.