My Water Python of about the same size tricked me. She had managed to climb up and wedge herself between a cupboard and the wall, halfway up, if you looked under the cupboard or on the cupboard, she didn't appear to be there, however, when I pulled it off the wall, she fell down from her hide spot and gave me a filthy look.
They are masters at this, if you think they can't be there, take a look. One wedged herself inside an ornament, another found the tiniest hole and managed to get inside a lounge cushion. A friends tiny spotted python made it next door and emulated a chess piece.
Try putting a live rat in a cage your Bredli can't get into, under a cardboard box with a small hole for entrance, in a warm spot in each room. Create a wonderful attractive hide and hope for the best.
Good luck, if I could pop round to help search, I would.