Whether sentences are consecutive or concurrent is at the discretion of the judge and there is a matter of judgement about whether the charges represent offenses that were discrete or effectively part of the same crime.
Take an extreme case - A fraudster sets up a website and tricks 100 people into paying him money sentencing to 100 consecutive sentences would not be commensurate to the crime.
Immagine if ITV were to be charged seperately for each person who'd lost money on phone ins!
Take this case in appeal
http://www.courtsni.gov.uk/NR/rdonlyres/CB6EE3 A2-4DA5-4561-8159-ABFAA3B9F37E/0/j_j_CARF3492. htm
The judge imposed
Count 1, escaping from lawful custody � 12 months.
Counts 2 and 3, dangerous driving � 21 months, concurrent with each other but consecutive to the sentence imposed on Count 1.
Count 5, driving with excess alcohol � four months concurrent, with ten years� disqualification.
Count 6, driving while disqualified � nine months, concurrent with Count 5 but consecutive to the sentences imposed on Counts 1, 2 and 3.
Count 7, no insurance -- �50 fine.
Count 8, obstructing a constable, three months concurrent.
Count 9, assaulting a constable, three months concurrent.
Count 10, resisting a constable three months concurrent.
He basically grouped similar crimes (obstructing a constable, assaulting a constable, resisting a constable) together and ran them concurrent but consecutive to seperate crimes.
Why then bring all these seperate charges? Why not just bring the most serious? well obviously it might fail. The case off assaulting a constable might fail whereas resisting arrest might