2019
February: Arthur's biological mother, Olivia Labinjo-Halcrow, 29, kills her partner Gary Cunningham by stabbing him 12 times with a kitchen knife.
Arthur is moved into the care of his father, Thomas Hughes, 29. Later he meets Emma Tustin, 32, online.
Hughes and Arthur moved into an annexe at the back of his parent's garden.
His grandmother said Arthur was 'nervous' at first but became a 'happy, well-rounded child'.
August: Hughes met Tustin on dating website Plenty of Fish. They went on their first date in a pub.
Tustin failed to reveal that in 2013 she had tried to commit suicide.
She also failed to reveal how her first two children went to live with their fathers.
After three dates Hughes introduced Tustin to Arthur.
September: Hughes' brother Blake said his nephew's behaviour 'change quite a lot'.
He said his brother became more anxious at being told off while his brother 'became a lot stricter.'
Hughes also recalled an incident where he argued with Tustin because he bought Arthur a Subway sandwich, which she said was 'an unnecessary treat.'
October: Aileen Carabine, a special educational coordinator at Arthur's school, said Arthur 'deteriorated' that month.
She said he became more reserved, anxious and 'not quite as smiley'.
November: Thomas and his mother Joanne met with Arthur's school to discuss their growing concerns about his behaviour.
Teachers said Arthur was having nightmares and spoke of his father 'killing him.'
Tustin became pregnant with Hughes, but had a miscarriage.
December: Arthur became upset during a Christmas nativity when the baby was taken out of its crib.
Hughes proposed to Tustin in the annexe.
2020
January: Arthur's school begin to raise concerns about him, including his 'clinginess' and 'obsession' with soft toys'.
February: Tustin took Arthur with her to have her hair done.
