Recent changes to the Employment (Equality) Age Regulations 2006 means partners cannot be made to retire at 65, unlike practice employees.
This means young GPs cannot assume partnership opportunities will arise regularly, says Jean Sapeta, a partner at Hempsons solicitors.
The regulations could exacerbate the lack of partnerships available for the rising number of salaried GPs in the UK, as partners retire later.
For salaried GPs to remain at a practice, there needs to be a sufficient turnover of partners so they have the chance to become a partner, said Ms Sapeta.
Figures from The Information Centre reveal the number of GP partners in England fell from 29,340 in 2005 to 27,342 in 2007.
The number of GP partnerships in England have decreased steadily each year between 1997 and 2007, from 9,102 to 8,261, despite an overall rise in the number of GPs from 30,959 to 36,420.
Comment below and tell us what you think