The incident took place on Monday the 20th of June as a Northern service approached Hull Paragon station and is still under investigation by British Transport Police.

The appalling action saw 15-week-old Esme Emmerson hit by flying glass.

Esme was travelling with her parents, Jason Emmerson and Kristina Vojsovicova on the 15:00 Northern service from Bridlington to Hull, the incident took place at 15:45 and happened close to Snuff Mill Lane.

Northern has previously offered a reward after a driver was injured by a brick that was thrown at a moving train.

Tony Baxter, regional director for Northern, said:

“In our experience, this sort of attack is rarely the action of a ‘lone wolf’ and more likely the reckless pastime of a group that thinks it’s fun to throw things at fast-moving trains.

“The perpetrator has had a month to turn themselves in and has chosen not to – so it’s time for someone who was with them and knows what happened to come forward and help British Transport Police with their investigation.”

“The consequences of a brick hitting a fast-moving train are potentially devastating and we can only give thanks that little Esme wasn’t more seriously injured.”

Anybody with any information can get in touch with British Transport Police by texting 61016 or by calling 0800 40 50 40.

To call anonymously, people can call Crimestoppers on 0800 555 111.