Strictly speaking, "not one" is correct.
When subsequently questioned, of the 2016 cohort of 6736 doctors who finished F2, 707 were out of work (10.5%), and 923 not practising medicine (13.7%). Overall, 50% of F2s did not directly enter speciality training.
As for competition ratios, it doesn't matter how many jobs there are, that is the point of ratios and 140:1 is for graduate jobs overall. Furthermore, there is a wide range of jobs within medicine, some of which have competition ratios <1.
Any way you cut it, despite its relatively uncompetitive entry, medicine has one of the best employment prospects and earnings.