I didn't see this a couple of years ago, or I'd have pointed out that there never was a Synod of Whitby! Whitby is a Scandinavian name, and they didn't arrive till long after. It's possible that there was something that could be charitably described as a synod at Streonshalgh, but even this is disputable, and it's by no means certain that this was where Whitby is now. King Oswiu was perfectly happy to accept Wilfrid's blandishments and take secular control of the church from Colman's all-too-independent Celts.