Science and Medical Correspondent Lawrence McGinty interviews Dr Cundy at a surgery in Wimbledon which is taking industrial action. They have only seen six patients this morning so far.
Just 8% of doctors working in the NHS in England went on strike, according to the Government. More than 20,000 patients were affected.
Doctors are taking industrial action for the first time in almost 40 years but what are the arguments for and against pension reforms?
More than half of people surveyed in an exclusive ITV News poll oppose the doctors' strike over pensions that will take place on Thursday.