A British man has been jailed for more than four years after admitting more than 100 bomb hoaxes – including racially-motivated threats to Jewish schools.

Andreas Dowling, from Torpoint in Cornwall, was sentenced at Exeter Crown Court after pleading guilty to 31 charges relating to 107 offences dating back to 2014.

His hoaxes led to 35,000 pupils being evacuated from schools in the UK, and he was unsuccessful in attempting to disrupt the Super Bowl in 2015 and the Houses of Parliament.

The court heard that Jewish schools were “over-represented” as UK targets selected by Dowling, with the prosecution claiming he threatened to detonate bombs at 4.20pm – a reference to Hitler’s birthday.

Mrs Justice May described the hoaxes as “pernicious and nasty” and said some were racially aggravated.

She said the hoaxes caused a “great deal of distress and disruption” and “extreme anxiety for headteachers”.

Dowling, 24, used software to disguise his voice. He rang 75 schools across the country, from Somerset to West Yorkshire, between January and February 2016.