I'm in his FB group and asked him about his pb's and ultras in uk. He responded back on ultras but gave no info on his pb's.
The Scot wrote:
I am not even sure I have seen a Run on Strava with cadence, maybe I saw one once from a Fenix? If someone has an example can they post a link to the session please?
All the latest Garmins include cadence. I don't know about TomTom.
Random example: https://www.strava.com/activities/638163982