Corrie fans surprised as they spot 'Catherine Tate' in guest role on ITV soap

Coronation Street fans are convinced Catherine Tate had a guest role on the soap - but it was a case of mistaken identity.

The ITV soap aired scenes tonight, as Summer Spellman and Aadi Alahan took their exam. Summer has been nervous about her exam - and didn't have to take it after her recent health scare, but she felt it was best to go and do it in person.

Aadi had made some revision notes for Summer but in a panic, worried she wouldn't be able to remember everything, she snuck the notes into her pencil case alongside her insulin and tried to use them.

The invigilator blamed Aadi for what happened (ITV)

However, as she told the invigilator she needed to check her insulin, she dropped them all over the floor without releasing. When the new invigilator came in, she noticed them on the floor and immediately matched them to nearby Aadi's handwriting.

She called him out of the room, where Summer was sat with the invigilator and it soon dawned on the teenager what happened.

Aadi was blamed for the cards and accused of cheating, but fans were distracted by the invigilator's celebrity lookalike.

Catherine Tate has a long acting career already behind her (Getty)

But it was a case of mistaken identity tonight (Getty)

Taking to Twitter, viewers said the invigilator looked exactly like comedienne Catherine Tate.

"The examiner lady looks like Catherine tate #Corrie," one fan wrote, as a second added: "That invigilator - Catherine Tate!! #Corrie."

A third wrote: " #corrie that teacher looks like catherine tate lol," with a fourth penning: "Calm down, Catherine Tate. #corrie."

Now Aadi faces being expelled or suspended from school as an investigation is carried out into the 'cheating'.

Aadi now faces suspension or worse (ITV)

Later this week, Summer and Aadi are called to attend a meeting at school over what happened earlier in the week, as Dev is left convinced that his son is covering for his crush Summer.

Worried about his son, he tells Aadi that Summer has a new boyfriend so there's no need for him to be so protective of her and her future at Oxford University, but Aadi snaps back, fuming at his dad.

Will he keep up the lies - or will Summer confess the truth to what happened?

*Coronation Street airs Mondays, Wednesdays and Fridays on ITV at 8pm.