Baby Charlie's parents end legal bid

The parents of Charlie Gard say time has run out to treat their son, saying time has run out to save him.

Parents of critically ill baby Charlie Gard have quit their fight to send him away for treatment. (AAP)

The parents of critically ill baby Charlie Gard are dropping their legal bid to send him to the United States for experimental treatment.

Lawyer Grant Armstrong said on Monday Chris Gard and Connie Yates are withdrawing their appeal to court orders saying Charlie's treatment should end.

The couple cried at London's High Court as their lawyer said time had run out for 11-month-old Charlie.

The couple has been fighting court rulings saying their son's life support should be withdrawn.