Just shy of 100 people complained to the TV watchdog after Johnson's recent interview on Good Morning Britain.
The former Good Morning Britain presenter had his say on his former co-host Susanna Reid's interview with the prime minister.
The PM came under fire for how he dealt with a question on Good Morning Britain about Elsie, 77, who rides the bus all day as she can’t afford heating.
Susanna Reid noted researchers would "go through your answers with a fine-tooth comb".
The prime minister had hoped his long-awaited appearance on the ITV breakfast show would give the Tories a local election campaign boost.
About Susannah Reid
After an early career as a reporter on BBC Radio, Susanna Reid became a household name as one of the main presenters on BBC Breakfast. A little bit of luck paid a part in Susanna breaking into TV after she filled in for a missing presenter on BBC News 24, which turned into a permanent position after she impressed Beeb bosses and viewers alike. It led to her landing a spot on the BBC Breakfast sofa alongside Bill Turnbull in 2004 and was still there a decade later. Well, until ITV came knocking that is, who poached Susanna to co-host the revamp of Good Morning Britain, despite Susanna once claiming that she would never leave the BBC because it was 'in her blood'. The rumoured £1 million contract might have had something to do with her change of heart. Susanna's move to ITV came shortly after a hugely successful stint on the BBC dance show 'Strictly Come Dancing' in 2013. Her partnership with professional dancer Kevin Clifton wowed the judges and viewers alike who voted her through to the grand final. She eventually came third behind Coronation Street actress Natalie Gumede and model Abbey Clancy, who was crowned Strictly champ.