The former firefighter was convicted of three sex acts against girls, the youngest of whom was 14, as well as three counts of exposure after ‘flashing’ at neighbours from the bedroom window of his home.

Following his sentencing at Leicester Crown Court, a friend of one of the families involved in the case said: “It’s taken three years to get to today’s judgement and as traumatic and devastating as it has been, we knew that if someone hadn’t stood up to him, he would have continued to do this to other families. We knew he had to be stopped.”

At his trial at Birmingham Crown Court last month, the court heard that Coe, whom it is believed changed his name to Seb from Barry, sent thousands of texts to under-age girls as well as many to their mothers.

His 14-year-old victim told the court Coe’s texts became flirty before he sent her an obscene photo of himself.

The former firefighter told the underage girl he fantasised about having sex with her and pop star Rihanna.

When the 14-year-old told the police about Coe’s behaviour, a subsequent investigation revealed he had sent inappropriate and explicit texts to two other young girls.

Originally from Sutton Coldfield, he was sacked by the West Midlands Fire Service for downloading pornography on a work computer.

Coe, aged 37, was sentenced last Thursday at Leicester Crown Court.