Except during the midst if the pandemic (2020 and 2021), the Weeting Steam Engine Rally has been held annually in mid-July since 1968. Uniquely, the owner of the farmland also owns some Traction Engines which always feature at the Rally.
Featuring 88 Full-Size Traction Engines (including the Tuxford Portable) this year, this event would be placed at the Large end of the Steam Rally spectrum. My first visit was back in 2019 and I was more than happy to make a return visit after 3 years.
https://www.youtube.com/watch?v=BGM2Ts8U0-8