Why Olivia Colman’s Character Was Recast In Heartstopper Forever
However, in its third iteration, she was unable to appear, with Hayley Atwell instead appearing as Nick’s aunt, who served a maternal role in his life for these episodes.
Article source: https://www.huffingtonpost.co.uk/entry/why-olivia-colman-heartstopper-forever_uk_6a5a0140e4b0dbc76585f369