09:30, 19 JULY 2015 By Paul O'Hare
THE SCOTS racing icon may have been an expert on the F1 race track - but he says his heart is in his mouth when he sees his six-year-old son on his bike.
FORMER F1 star David Coulthard has admitted he is an over-protective parent - especially when it comes to racing in the park.
The BBC presenter, who had 13 Grand Prix wins during his career, revealed he turned down a recent challenge from his six year-old son, Dayton.
Coulthard told The Mail on Sunday: "I have my heart in my mouth when I'm on the bicycle with Dayton.
"He wanted to race on the bikes in the park and I was like, "I'd rather not, son, let's not do that.
"It's one thing falling off at low speed, i...