Perhaps a few suggestions:
1) Bring back Borstals
2) If 'kids' commit "Adult" crimes (such as firearms offences) let them face "Adult" courts and "Adult" sentences.
3) Add 'other' offences committed during the commission of a crime into the mix at sentencing - example: If a shooter has no suitable licence, there's an automatic extra "illegal possession" charge (that's worth up to 5 years).
4) Drop the 'sentences served concurrently' crap - make it CONSECUTIVE, let the ba*ds know that they stand the chance of going away for a VERY long time.
5) "Bolt On" additional sentences for use of weapons - as a suggestion:
Using anything "a reasonable person" could take for a firearm (Touys, replicas, blank firers, de-activated weapons etc.) -2 Years
Assault with above (not discharged) - 3 years
Discharging same - 4 years
Assault with firearm (weapon discharged) - 6 years
Wounding with firearm - 8 years
Homocide (deliberate or not) 15 years (no reduction)
The above to be 'add on's, to be served consecutively with any sentence for the crime for which the defendent is convicted (so a murderer would get Life + 20 years (15 for the homocide + 5 for illegal posession) + the appropriate 'bolt on' for anyone else killed or injured.
Maybe it won't be seen as a deterrent, but it will keep the scum out of society*
6) Bring back public Corporal Punishment - A birching in public would have more effect than any ASBO
7) Bring back 'Hard Labour' (preferably, heavy, hard and soul destroyingly boring) and 'Rigorous Imprisonment'
Unfortunately these last two would be condemned as 'cruel and unusual' and probably be condemned under 'Human Rights' legislation.


* Can we start a prison colony on Rockall?