Question: is putney a marginal seat?
Answer: Putney was the first Conservative gain on election night in 2005, when Justine Greening took back the seat from Labour on a two-party swing (Lab-Con) of 6.5%. The 2015 result gave the seat the 148th most marginal majority of the Conservative Party's 331 seats by percentage of majority, similar to the 2010 result.