His trial was told how he had ordered the device after his mother discovered he was in a relationship with a girl she disapproved of.

The court was also told that the former pupil from Wolverhampton Grammar School had accepted an offer to study medicine at Liverpool University.

Randhawa had previously pleaded guilty to attempting to import explosives but was found guilty of the more serious charge of maliciously possessing an explosive substance with intent to endanger life or cause serious injury.