Is Failsafe from The Inbetweeners a real band?

No, Failsafe from The Inbetweeners is not a real band. It was a fictional band created specifically for the show.

The band's music was written by the show's composers, and the lyrics were often humorous and relatable to the show's target audience.

While they were never a real band, they were very popular with fans of the show, and their songs continue to be enjoyed by fans even after the show's ending.