Conversation so far:
What were some changes to the group Bucks Fizz line up?
The line-up of Bucks Fizz has changed a number of times over the years, most famously when Jay Aston quit the group and was replaced by Shelley Preston.
Who quit the group Bucks Fizz?
After early promotion and a concert in Newcastle, Jay Aston sensationally quit the group, despite still being under contract.
Did Jay Aston leave the group Bucks Fizz?
After early promotion and a concert in Newcastle, Jay Aston sensationally quit the group, despite still being under contract.
Was Jay Aston from the group Bucks Fizz a female?
Jay Aston was one of the female vocalists in Bucks Fizz.
what were some conflicts Jay Aston had with the group Buck Fizz?
Jay Aston had been having an affair with Andy Hill, the husband of the group's creator Nichola Martin.
What was the result of the affair between Bucks Fizz' Jay Aston and Andy Hill?
Jay Aston was sued by management over breach of contract while a replacement member was quickly sought to continue promotion for the current single.

Question: Who was the replacement they chose?
Self-contained rewrite: Who was the replacement that the group Buck Fizz chose to replace Jay Aston?