Ben Shephard has shared his excitement after the organisers of Parkrun announced the planned return date for weekly 5k running events.Taking to his Instagram page over the weekend, the Good Morning Britain - who is an avid runner - shared a rare picture with his eldest son Sam following an impromptu 5k jog around their local park.MORE: Ben Shephard shares gorgeous rare selfie with wife Annie to mark Valentine's DayWATCH: Ben Shephard shares concerns for his sons' mental health"So big news that