They are spade terminals if my memory is correct.They should just pull away from the terminals. If I cam wrong, you may have to cut and rejoin them safely, using joining blocks.
If they are spades and won't move, look into the middle of the spade and you may see a tiny tag pushed into a round hole in the terminal. This tag needs to be pushed out of the way.
The neutral wire came off and the live moved a bit, I'll probably get it off easily with a pair of pliers since it is hard to get a good grip on such a small connector.