In relation to recklessness it all used to be between subjective and objective recklessness. The concept of objective recklessness being R V CALDWELL (1982) however this has now gone and is restored to it’s former position of R v G & R (2003). This case was 2 children who set fire to some burning newspapers in the rear of a shop yard whilst camping out. The children put the burning papers under a wheelie bin and left them expecting the small fire to burn out. It didn’t and caused a million pounds worth of damage.
Under R V Caldwell the children would’ve been convicted on the basis that the risk of the fire would have been obvious to any reasonable bystander, however their convictions were quashed by House of Lords who reinstated the general subjective element.
How interesting the law changes then returns to it’s original. There is some case law relating to assaults that still stands now and it is from 1669 and another from 1853!!!