During his visit, he condemned the Liberal Democrats for "insulting" the electorate by focusing their campaign on the Iraq war, and appealed to voters not to let the elections become a referendum on the conflict.
The Prime Minister said people should focus on the state of Britain's public services in the local and European polls but promised to take personal responsibility for the outcome of the elections, saying: "I am Prime Minister. I always take responsibility. The buck stops with me and that's part of the job."
His dismissal of a new tax on food manufacturers came as pressure mounted for action to tackle obesity.
A Government study warned that Britain suffers from the highest rate in Europe, and it was revealed a three-year-old girl had died from being severely overweight.
A scathing inquiry by the House of Commons Health Committee criticised Cadbury and fast food firms including McDonald's and PepsiCo.
Reports suggested the Government was considering a range of measures including taxing unhealthy foods but Mr Blair said he believed the public had to take responsibility for what they ate.
