William Hague, the Leader of the Commons, who was campaigning with Miss Tolhurst, was forced to defend a Tory leaflet highlighting the fact Mr Reckless studied at Oxford University and worked at Conservative Central Office and in the City before becoming an MP.
The leaflet says it is a "straight choice" between Miss Tolhurst, a marine surveyor who was "born and raised" in the constituency, and Mr Reckless who "studied politics at Oxford" and "only moved here to be an MP".
One Tory MP asked to deliver the literature described it as "total c--p" and "completely stupid" because it highlights Mr Reckless's career achievements.
Mr Hague, who like many senior Tories studied Politics, Philosophy and Economics at Oxford, said: "I dont think there's any class war."