They could get up to 10 years. 1) They're innocent, their defense was totally plausible 2) They were just two lads having a lark, it was only a tree. It can be re-planted, or a nice shrubbery or something. We are too punitive a country (bastard politicians are to blame). I can sympathise with them, they didn't realise it'd be quite this shit storm which is punishment enough probably. Three months max? Sounds about right. Six months inside would be an hard lesson. Anything more, come on, it was only a tree. We can recover from this surely? They are not beyond forgiveness, there might be a funny side to it, not if they go down for years it won't be. Free! The sycamore gap two.
What would Jesus say? Some mad stuff probably but still.