Wow, I'm quite surprised at the length of these sentences, given it didn't exactly come across as a preplanned plot to kill, more something that spiralled out of control. Not that they don't deserve a severe sentence, I just didn't expect it when so many people who do specifically plan a murder get less. I'll be interested to read the full sentencing remarks and see more about how the judge decided it.
Edit, ah, I see BBC says "Raees Jamal, 23, has been sentenced to a minimum of 36 years in custody for murder and for an unrelated offence." so perhaps the length of his sentence includes the 12 years he's already serving - I thought 36 seemed high! Although I'd have preferred a consecutive 30, as now it looks like he's only been given 24 years for the murder.