Nothing the MOD do makes sense. The biggest crime is trying to develop our own arms and equipment when it always ends up costing far more and is usually inferior to stuff that is already on the market. The only reason I can think of is to hand big fat contracts to someone who will be rewarding you with a seat on the board when you retire.
In the 80s when it was time to replace the venerable SLR, instead of going for something which would be cheaper and better, they went for a design that was shit, cost a fortune and dated from WW2. It was so bad they had to bring in Heckler and Koch to fix it.
So our forces are usually woefully equipped and countries who spend far less on defence than us have far better weapons and equipment.