The 50-year-old construction boss was among 56,000 participants at the Tyneside event, taking on the likes of double Olympic gold medallist Mo Farah.
Running to raise money for the Marie Curie Cancer Care charity, Mr Wyllie completed the 13.1 mile course in a time of 1 hour, 50 minutes and 56 seconds. He came 9,025th.
Ethiopian Kenenisa Bekele won the race in 60 minutes and eight seconds – just one second ahead of Mo Farah.
Mr Wyllie said: “It is a great thrill to take part in the world’s largest half marathon. To record a personal best time of 1 hour, 50 minutes and 56 seconds in challenging weather conditions is proof of what can be achieved with a bit of training and perseverance.
“I continue to be a long term supporter of Marie Curie Cancer Care as I think they do an outstanding job providing invaluable support when it is needed most.”