Edmond Ferdinandus, a GP in Wakefield, West Yorkshire, said:
A small fee will make patients feel they have a large entitlement - if we do this, I predict the extra income will be entirely cancelled out by extra prescriptions, investigations or referrals.
Chaand Nagpaul, chairman of the General Practitioners Committee which represents GPs in Britain, agreed and said the NHS should be free at point of delivery:
Charging patients would have adverse effects and would fundamentally be to the detriment of GP-patient relationships. We need to preserve trust between patients and their GPs.
More top news
Economics have warned of drastic consequences if Prime Minister Theresa May fulfills her pledge to walk away from a "bad" Brexit offering.
Arsenal manager Arsene Wenger is set to sign a new two-year deal at the Emirates.
The SNP has unveiled its manifesto pledging to increase the minimum wage and to call for a second independence referendum.