"I'm hoping my children will be at the finish-line so I can cross it with them" @thebiscuitg is our @walledmarathon first-timer today for @bbcradiofoyle #reasonforrunning series

For many of the runners that will line out for this Sunday's Walled City Marathon, they'll be taking on the challenge for the first time. One of those first-timers will be 35-year-old Gary Ferry. He only started running last year, he worked his way up to half marathon and now he's going the whole hog.