David and Tracy are outbid as they try to buy No.8 in Corrie

But who is the mystery bidder?

Having failed to secure a mortgage, David and Shona are at their wit’s end. When Shona asks Audrey if she can lend them the money to buy No.8, Audrey reminds her that David stole from her. And when Steve returns from the Peak District, he's shocked to find out that Tracy intends to buy No.8.

Spotting a tel