The Conservatives held Cheadle from the 1970s to 2001 when Liberal Democrat Patsy Calton beat Tory Stephen Day. Ms Calton held the seat in 2005, but died shortly after the election. At the subsequent by-election, Lib Dem Mark Hunter won, taking 52% of the vote compared to the Conservative candidate's 42%.
At this election, the part-ward of Stepping Hill is gained from Hazel Grove. Other part-wards of Hazel Grove, and Davenport and Cale Green are lost.
To find out what might have happened had this boundary change been in force at the last election, see a notional - or estimated - result below.
Cheadle is an affluent commuter area to the south of Stockport, including the exclusive suburbs of Cheadle Hulme and Bramhall.
It has one of the highest proportions of professional and managerial workers of any seat north of Watford. It also has the highest proportion of owner-occupiers and the highest proportion of detached housing of any seat in the North of England.
Most local residents commute to work in the financial and service sectors of Manchester. Manchester Airport, two miles away, is another major contributor to the local economy, as is the modern John Lewis-Sainsbury's shopping centre at Cheadle Royal.
The seat contains several top-performing schools, including the independent Cheadle Hulme School. Cheadle residents are served by the recently redeveloped Stepping Hill Hospital in Stockport.
Rallings & Thrasher Notional:
LD 23,671 (47.76%)