Prosecutors said the girl, known as Gigi by her family, died from asphyxiation from a combination of “pathophysiological stresses”.
Roughley had placed her face-down, tightly swaddled and strapped to a bean bag before covering her with a blanket.
The nursery deputy manager then ignored the cries and distress of Genevieve and showed “sporadic” and “fleeting” interest in her wellbeing for one hour and 37 minutes until she found her blue and unresponsive, prosecutors said.
Sentencing, Mrs Justice Ellenbogen told the defendant Genevieve’s death was “absolutely avoidable”.
She said: “As the harrowing CCTV audio and video footage showed, that day you left Genevieve in that position only carrying the most cursory and infrequent of checks.
“I am certain that every person in this courtroom who watched that footage was willing you to pick her up and remove her from the danger you had placed her, knowing of course that you didn’t.”
The judge went on: “It was apparent that at best you considered Genevieve to be a nuisance and at times displayed antipathy and frustration with her.
“Your interactions with Genevieve on 6 May and 9 May palpably lacked any care, kindness or concern for her wellbeing.”
As Genevieve’s crying “intensified” as she struggled on the bean bag, the judge told Roughley: “Even then you didn’t approach her, pick her up or shown any concern for her welfare. You left her to die.”
The 37-year-old, who was the duty baby room leader in charge of sleeping arrangements that day, told Manchester Crown Court she placed Genevieve on her side, claiming her face was visible at all times.
She said she had no concerns she was in any distress.
Jurors were in tears at the start of the trial as they watched the nursery CCTV footage which captured the tragedy unfolding from 1.35pm to 3.12pm.
The defendant’s case was that Genevieve’s death was a “terrible and unavoidable accident” and not the result of any unlawful acts.
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Roughley, of Heaton Norris, Stockport, joined Tiny Toes straight from college at the age of 18 and said she gained most of her knowledge of working with babies and young children from her colleagues.
She said the ratio of staff to children at the nursery “gradually worsened”.
In April and May 2022 the staff-to-children ratio was at various times one to nine, two to 11, two to 13 and one to 16, the court heard.
A woman has suffered life-changing injuries after being stabbed by a member of the public at the accident and emergency department where she was working.
The victim – believed to be a nurse in her 50s – was attacked at Royal Oldham Hospital in Greater Manchester, where she is now being treated.
It is understood she was injured with a bladed article or a sharp instrument – and not by a knife.
Officers were called at 11.30pm on Saturday.
A 37-year-old man is in custody after being “swiftly arrested at the scene” on suspicion of attempted murder, Greater Manchester Police said.
Detectives are not looking for anyone else in connection with the incident and say there is no threat to the wider public.
Jim McMahon, the Labour MP for the area, described it as a “senseless attack”.
He posted on Facebook: “We are all shocked at the senseless attack on a nurse in the A&E department of the Royal Oldham Hospital.
“Our thoughts are with the nurse, family and friends as we wish a full recovery.”
Detective Sergeant Craig Roters said it was a “serious incident which has left a woman in a critical condition”.
The victim’s family and colleagues will be supported, he added.
The local community can expect to see an “increase in police presence” while enquiries are carried out, Mr Roters said.
“We know that news of this nature will come as a shock, and if you have any concerns or anything you would like to share, please speak to [officers].”
Conservative Party leader Kemi Badenoch has called on Sir Keir Starmer to sack Treasury minister Tulip Siddiq over allegations she lived in properties linked to allies of her aunt, Sheikh Hasina, the deposed prime minister of Bangladesh.
It comes after the current Bangladeshi leader, Muhammad Yunus, said London properties used by Ms Siddiq should be investigated.
He told the Sunday Timesthe properties should be handed back to his government if they were acquired through “plain robbery”.
Tory leader Ms Badenoch said: “It’s time for Keir Starmer to sack Tulip Siddiq.
“He appointed his personal friend as anti-corruption minister and she is accused herself of corruption.
“Now the government of Bangladesh is raising serious concerns about her links to the regime of Sheikh Hasina.”
Ms Siddiq insists she has “done nothing wrong”.
Her aunt was ousted from office in August following an uprising against her 20-year leadership and fled to India.
On the same day, the prime minister said: “Tulip Siddiq has acted entirely properly by referring herself to the independent adviser, as she’s now done, and that’s why we brought into being the new code.
“It’s to allow ministers to ask the adviser to establish the facts, and yes, I’ve got confidence in her, and that’s the process that will now be happening.”
Police in Aberdeen have widened the search area for two sisters who disappeared four days ago in the city.
Eliza and Henrietta Huszti, both 32, were last seen on CCTV on Market Street after leaving their home on Tuesday at around 2.12am.
The sisters – who are part of a set of triplets and originally from Hungary – crossed the Victoria Bridge to the Torry area and turned right on to a footpath next to the River Dee.
They headed in the direction of Aberdeen Boat Club but officers said there is no evidence to suggest the missing women left the immediate area.
Specialist search teams, police dogs and a marine unit have been trying to trace the pair.
Further searches are being carried out towards the Port of Aberdeen’s South Harbour and Duthie Park.
Police Scotland said it is liaising with authorities in Hungary to support the relatives of the two sisters.
Chief Inspector Darren Bruce said: “Eliza and Henrietta’s family are understandably extremely worried about them and we are working tirelessly to find them.
“We are seriously concerned about them and have significant resources dedicated to the inquiry.”
The sisters, from Aberdeen city centre, are described as slim with long brown hair.
Officers have requested businesses in and around the South Esplanade and Menzies Road area to review their CCTV footage for the early morning of Tuesday 7 January.
Police added they are keen to hear from anyone with dashcam footage from that time.