By Enda Brady, Sky News Correspondent
Patients will be guaranteed cancer tests and results within a week under plans outlined by Labour leader Ed Miliband.
Labour has pledged to pump £700m into cancer diagnosis over the course of the next Parliament if they win the General Election.
The money will come from a new levy on tobacco companies, they say.
Mr Miliband says he wants Britain to lead Europe in terms of cancer survival rates and predicts such a huge investment could save 10,000 lives a year.
"Labour has different values on the NHS than this Government," said Mr Miliband as he visited Cancer Research UK in Cambridge.
"We believe in collaboration rather than free-market competition, in prevention not picking up the pieces, and accountability rather than undermining patients' rights and guarantees.
"Labour has different priorities from this Government. We would raise taxes on the most expensive homes worth over £2m in our country, hedge funds which avoid paying their fair share, and the tobacco firms whose products cause so much ill-health and suffering.
"This money will help pay for the investments we will make with our NHS Time to Care Fund."
The Treasury earned £9.5bn from tobacco duties in 2011-12, but the cost of smoking to the NHS is estimated at between £2.7bn and £5.2bn per year.
Mr Miliband added: "Labour has a plan for the NHS so that it can meet the challenges of the 21st Century.
"We have already said we will guarantee GP appointments within 48 hours. And we have already shown how our Time to Care Fund will ensure the NHS has 20,000 more nurses, 8,000 GPs, 5,000 home care workers and 3,000 midwives so they have the time to care for you.
"Now Labour is setting out the next stage of our NHS Plan: a guarantee that no-one will have to wait longer than one week for cancer tests and results by 2020.
"It is critical that we improve early diagnosis of cancer - a killer disease that one in three of us will get - so that we can match the best countries in the world for surviving it.
"And this is a plan paid for by money raised from the profits of the tobacco firms whose products have done so much to cause cancer in the first place."
Mr Miliband came in for criticism at the Labour party conference when he forgot to mention the deficit in his keynote speech, but when it came to the NHS he made no such mistake.