Carl I found this
We want to make your whole experience, from start to finish, enjoyable but also easy so we’ve made Registration available from Saturday between 8am and 6pm, as well as Sunday between 6am and 10.00am.We’ve got our Tour Makers on hand and ready to greet you on arrival, give you your Rider Pack and also point you in the right direction. Please bring a printed copy of your Entry Confirmation with you, along with a piece of photo identity.
In here https://www.toc100.com/pdf_downloads/ToC100%20and%20ToC67%20V1.3.pdf[URL]https://www.toc100.com/pdf_downloads/ToC100%20and%20ToC67%20V1.3.pdf[/URL]
So it looks like you can register upto 10am Sunday too
We want to make your whole experience, from start to finish, enjoyable but also easy so we’ve made Registration available from Saturday between 8am and 6pm, as well as Sunday between 6am and 10.00am.We’ve got our Tour Makers on hand and ready to greet you on arrival, give you your Rider Pack and also point you in the right direction. Please bring a printed copy of your Entry Confirmation with you, along with a piece of photo identity.
In here https://www.toc100.com/pdf_downloads/ToC100%20and%20ToC67%20V1.3.pdf[URL]https://www.toc100.com/pdf_downloads/ToC100%20and%20ToC67%20V1.3.pdf[/URL]
So it looks like you can register upto 10am Sunday too