The omnibus, publish on ITV2 on June 3 at 8.50am, sparked complaints with a scene featuring three men hit for sex and following 16-year-old Bethany Platt (Lucy Fallon) into a bedroom.
Viewers saw another characteristic, Shona Ramsey (Julia Goulding) being beaten and stamped on by a sprinkling men.
Chris Harper plays Nathan Curtis in the long-running grooming storyline.
An Ofcom spokesman said: «We’re investigating whether this Saturday morning omnibus chapter contained scenes that were unsuitable for broadcast at that immediately.»
The watchdog assessed but decided not to investigate 73 complaints about a drug winsome scene on the soap and 24 complaints about the grooming storyline on disunite episodes in June, broadcast in the evening on ITV.
Ofcom were forced to scrutinize the Coronation Street omnibus following the Bethany Platt storyline
We concluded that both storylines were obviously signposted
The spokesman said: «We concluded that both storylines were audibly signposted and were the culmination of long-running plots that were probably to have been within the audience’s expectations. The drug use was not shown in a certain light, and we took into account Coronation Street’s history of travel distressing social issues.»
It also decided not to investigate 92 grouse about comments made in the Big Brother house.
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Many of the complaints were approximately a «race row».
«We received a number of complaints about the recent series of Big Fellow-man,» the spokesman said.
The soap received complaints after the young fruit cake became the victim of grooming
An investigation concluded that the ‘storylines were understandably signposted’
«We are satisfied that Channel 5 broadcast clear and appropriate signals about potentially offensive content, and intervened appropriately in heated the markets and situations.
«We also took into account the audience’s expectations of this set reality format, and that the series is shown after the 9pm watershed.»