The 11-year-old's body was discovered by police divers at a lake in northern France on Thursday - three days after she went missing while on a school trip.
Parents gathered at Hill Mead primary school in Brixton, south London for the return of their children, whose first school trip abroad was cut short by the tragic death of their classmate.
As floral tributes and cards began to build up outside the gates, some parents demanded a full investigation into Bunmi's death.
French police believe the schoolgirl probably drowned in a tragic accident but are carrying out a thorough investigation.
Distraught teachers at Bunmi's school must also face an independent inquiry into how she could have escaped their supervision.
Safety guidelines
Geanette Walker, 36, who has a daughter of six at the school, said: "There needs to be a proper investigation to find out what happened.
"I will never send my daughter on a school trip again. I don't even know if I can trust the school to take her swimming now."
The schoolgirl was discovered missing during a "routine headcount" by staff after the visit to the Lac de Caniel near Dieppe on Monday.
There were 41 children and six adults on the holiday, which was well within government guidelines on ratios of teachers to pupils on swimming trips.
But Eileen Robinson, 41, who has a five-year-old grandson at the school, said people still needed answers.
She said: "The community will not be satisfied until we know exactly what happened.
"I would not send my children on a school trip now.
"Bunmi obviously wandered off, that's what children do at that age. I am not sure that they were supervised properly and this is what happened."
Youngsters traumatised
Friends of the primary school pupil have also been traumatised by her loss.
Six-year-old Latifa Juma, standing by the side of her mother Sharira said: "Bunmi was my friend and she was a nice person. I am very sad about this."
Simon Fajemifin, 36, who has three children at the school, aged six, seven and nine, had many questions about the tragedy which he says should "never have happened".
Mr Fajemifin said: "It was a long time before they realised that she was missing. Where were the teachers? How could she have disappeared from everyone's view?
"Even though this was not my child it could have been my child."
In the street where Bunmi lived, neighbours had gathered to discuss the tragedy, and were preventing reporters from approaching the schoolgirl's house.
One woman, who refused to be named, said: "People here are hurting. They need to be left alone to come to terms with what has happened.
"This is a tragedy for her whole family and of course we are all sad. But we need to be allowed to grieve."