From the Daily Mail website:
Describing the split seconds after the impact, the mother-of-one, 20, told the Mail Online: 'They just came out of nowhere. They were going so fast. They probably thought we would be able to get out of their way', she said.
'Olivia startled. So did I. I tried grabbing Olivia but she ended up going backwards. They missed me and hit Olivia. She went flying sideways.
'I thought this could be fatal. I went into shock. She was laying on her belly crying. I saw Olivia screaming and trying to drag herself off the road, shouting mummy. I grabbed her and cuddled her.'
Olivia was airlifted to Sheffield Children's Hospital suffering with fractured skull as well as cuts and bruises.
Ms Pollard added: 'Every time I look at my daughter it breaks my heart. To think that people could do that to her and then drive off while she lies bleeding in the road makes me sick.
'She almost went under the wheel of one of the bikes but the speed they'd hit her meant that she bounced off and was flung a few feet down the road. She landed head first.
'I ran up to her and as I held her, a lad on one of the other motorcycles looked right into my eyes.
'I begged him to stay and help me and he just drove off with the other two.
'They could see that Olivia was seriously hurt because she was covered in blood and still they did nothing to try and help.
Appealing directly to the motorcyclists' conscience, she urged the trio to hand themselves in to police, saying they had 'put my little girl through hell'.
'None of them stopped. They didn't even pause to see if she was alright.