The distraught mother of missing student Aamir Qudeer called for more information from students at the University of Bradford during a city centre appeal on Saturday.

The 21-year-old engineering student was last seen in Bradford on February 26, before travelling by train to Leeds and then vanishing in Liverpool.

In a fervent appeal for information, his mother, Zatoon Qudeer said she believes other students at the university may hold the clues to his disappearance.

She made a desperate plea for anyone in Bradford who knew her son’s whereabouts to get in touch with police: “Somebody holds the key to this, so please come forward. We just need to know he’s safe. It’s been six weeks and is just draining us all.”

“We feel we are trying to break a wall of silence,” said Mrs Qudeer, standing outside the Kirkgate Centre with her husband, relatives and family friends.

Mrs Qudeer revealed she and her husband, Abdul, had now checked Aamir’s phone bill for the period until the last sighting on CCTV in Mulgrave Street in Liverpool at 6.55pm, after he walked through the city from Lime Street station.

Police said his phone had been switched off since 10.30pm that day, and that he had not accessed his bank account since going missing, having left Bradford with only £185.

“We know he played football with his friends the night before he disappeared and was still up and texting them until 5am that same morning,” Mrs Qudeer said. “We pay for his contract phone and so we have seen the numbers and times on his bill.

“Somebody must know something,” she implored.

Mrs Qudeer also said that the precise sum of £185 had been withdrawn from his bank account, which was more than he would usually carry.

Interestingly, he had not simply emptied his bank account of all cash.

Mrs Qudeer also believes he is still in the country as both his passport and birth certificate are at the family home in Moortown, Leeds.

She also said police had checked with the passport office in Liverpool and he did not appear to have obtained a duplicate or passport under another name.

Asked whether Amir might have become radicalised, Mrs Qudeer said she was unaware of any change in that direction.

“There is nothing to suggest he had been radicalised.

And she said that all their family members had left Pakistan and live in Britain, making that an unlikely destination if her son had somehow left the country.

Investigation officer Detective Inspector Neil Benstead said: "We remain concerned for his welfare and are again appealing to him, or anyone who may have seen him to please make contact and reassure both us and his family that he is okay.

“Anyone with information or any possible sightings of Aamir can contact police on 101 or Missing People on 116000."