|Portrayed by||Tristan and Shaun Pires|
|First Appearance||Series 7 Episode 8|
|Last Appearance||Series 7 Episode 10|
|Cause/Reason||Was put into care.|
|Mother||Tina Allen (Deceased)|
Liam Allen is Scout Allen's little brother. He was also put into care but separated from Scout. He is three-years-old and is very curious. When his mum Tina Allen left for a few weeks to go on holiday, he was left alone in the family's flat. When Scout and Denzil Kelly had to go back to the school trip, Liam lets himself out of the flat. Scout tells Chris Mead what has happened and they both go back to the flat where they find Liam has gone.
Chris and Scout search for Liam and Chris was close to calling the police when he spots Liam by a busy road that is full of cars. He shouts at Liam to stay where he is and as he was about to run out Scout thankfully got to him in time and he survived.
He hasn't been seen or heard of since Tina (his mother) passed away.