The episode came with a warning (Pictures: BBC)

The BBC has launched an investigation into Some Mothers Do ‘Ave ‘Em after a viewer complained about the sitcom using a homophobic slur.

The British show – which starred Michael Crawford as Frank Spencer and Michelle Dotrice as his wife Betty – aired from February 1973 until December 1978 and was a hit with fans watching the accident-prone character’s failed attempts to hold down a job.