The 2020 LDR Rally is in Cornwall and coincidentally... I watched Henry Cole's Motorbike Show last night. It contained a feature on a Cornish ride and also Sam Lovegrove on his Ariel. It's available on catch up at https://www.itv.com/hub/the-motorbike-show/1a9745
I went to Cornwall this year and have attached a photo of a stop off, on the ride I did, on a similar route to Henry Cole.