-The Witch's handwriting is identical to Abigail's

Abigail's writing (TROS):

The Witch's writing (TRADM):

-The final part of the ritual at The Witch's house required the Detective to go to Waldegrave Manor at retrieve something that was "lost" - a wooden minifigure of Edward, Abigail's husband

-The Witch saw through The Craftsman's plan to manipulate her, similar to Abigail who saw through the charade The Circle set up for her husband to manipulate him

-The newspaper mentions a 'poisoned chalice' in an article about Abigail, The Witch owns a chalice that sits in her home

(undelined in red by me)

-A portait of Abigail can be seen in The Witch's cottage

-And lastly, they're played by the same person, Daisy Williams, a senior artist at Fireproof Games