Responding to the David Cameron's seven day NHS plans, a Liberal Democrat spokesperson said:
"NHS England already have plans to move towards hospitals and GPs being open seven days a week but to keep this sustainable we need to back the NHS with more investment.
"Only the Liberal Democrats have a credible plan to invest the £8bn per year by 2020 that NHS bosses say is needed.
"The Tories and Labour have put the NHS at risk. Only the Liberal Democrats can build a stronger economy and a fairer society where everyone has the opportunity to get on in life."