All four were directed to serve at least half their sentences in custody before being considered for release on license.
The group clearly targeted Brar in “revenge for his actions during his military career and today's convictions are another reminder that the UK will not tolerate extremism of any kind”, the Crown Prosecution Service (CPS) said.
During the sentencing hearing, the judge said: “The attack falls within the most serious category of wounding with intent and I have reached my decision based on the nature of injuries inflicted as well as the significant psychological harm caused to the Brars since the incident.
“Moreover, it involved a significant degree of pre-meditation and it was intended to inflict more serious injury as part of a religiously aggravated targeting of Mr Brar for his actions at the Golden Temple during his military career,” he added.
