Complex sentence: On Boxing Day, Megan enters a fire at Home Farm believing that Declan is trapped inside unaware that he caused the fire and left with Charity Sharma (Emma Atkins) earlier and becomes trapped herself but is later freed by the fire brigade.
Split into simpler sentences: On Boxing Day, Megan enters a fire at Home Farm, believing that Declan is trapped inside, but she is unaware that he caused the fire and left earlier with Charity Sharma (Emma Atkins). Megan becomes trapped herself but is later freed by the fire brigade.