In a bizarre act of unexpected intelligence, the British government passed a law allowing Brits to defend themselves in their own homes (and on the streets) without fear of reprisal — not from the burglars within, but from the government forces without:
Home owners and “have-a go-heroes” have for the first time been given the legal right to defend themselves against burglars and muggers free from fear of prosecution.
In practice, householders are seldom prosecuted if they harm or even kill an intruder but the Act will give them greater legal protection
They will be able to use force against criminals who break into their homes or attack them in the street without worrying that “heat of the moment” misjudgements could see them brought before the courts.
Under new laws police and prosecutors will have to assess a person’s actions based on the person’s situation “as they saw it at the time” even if in hindsight it could be seen as unreasonable.
For example, homeowners would be able stab or shoot a burglar if confronted or tackle them and use force to detain them until police arrive. Muggers could be legally punched and beaten in the street or have their own weapons sued against them.
However, attacking a fleeing criminal with a weapon is not permitted nor is lying in wait to ambush them.
You can read more here.
You really have to wonder what the world is coming to when English government does something sensible.