Yes, I got an automated response complete with entry reference number shown on the brevet card. I am fairly confident about the route, I quickly put something together in Strava builder, a direct route, without any meandering or scenic detours as per the guidelines. I wasn't totally pedantic and look on Google maps and selecting Walking mode as suggested in the guidelines, so fairly confident yeah. I've marked out my single control point which is between 50-80km.
However, I thought these had to be manually approved? I mean I have nothing to print off either, it says that the event organiser should Sign on my arrive at the start of the calendar event, but what should they sign exactly? I have selected a control point for the return journey as well (although I didn't mentioned it in "Other field"), but it too would be hard to avoid as its the other side of a bridge that spans a River; no alternative bridges for miles around - it's the direct route.
Probably worry about nothing, I will have an activity on Strava that I can easily export as a GPX file or directly from my Wahoo (somehow - still gotta figure that out) at the end of the ride, and will collect receipts at both control points (assuming its even required!?) which I can easily take a photo of on my phone again if necessary.
The automated email has a Tracklog uploader at the bottom of it - I think I will retain receipts until they are requested.