A drug dealer who sent a death threat to the councillor who closed Farringdon superclub Fabric has been jailed for eight months.

Sebastian Clark-Darby, 25, had emailed Cllr Flora Williamson saying “please note you have received an official death threat”.

The message was sent from his work computer at 10am on September 7, just hours after the licensing sub-committee chair had revoked Fabric’s licence following the deaths of two 18-year-old clubgoers.

He was sentenced at Blackfriars Crown Court on Friday after pleaded guilty last month.

At the earlier hearing, magistrates at Highbury Corner heard Clark-Darby had been reminiscing with colleagues about their nights out at the club and was reading furious reactions to its closure on social media when he sent the “stupid” email.

The court heard Cllr Williamson had feared for her safety after reading it and alerted police, who traced him through Facebook. He told officers he had sent the email to get a “reaction and a response” and had no intention of carrying out the threat.

Clark-Darby, one of 150,000 people to sign a petition supporting the club, had become “swallowed up in all the hype”, according to his lawyer.

He was already serving a suspended sentence for possession with intent to supply MDMA. He was sentenced to four months in jail for breaching the suspended sentence and four months for the email.

In a statement read out in court, Cllr Williamson said: “As a councillor I want to be accessible and reachable to the residents I represent. This made me worried I was not safe and I am concerned it will affect the way I carry out my duties as a councillor.”

Fabric will appeal the licensing committee’s decision next month at Highbury Corner Magistrates’ Court.