I spoke to Rob at Penzance this morning.
He hade made one attempt at 0630 as per his plan, but aborted when in Mounts bay and returned to Penzance, where I saw him.
It does look like he set off later in the day as his car and trailor were in the car park, but no boat.
But no lifeboats have been launched and the coastguard are not searching for any overdue ribs between Penzance and the Isles of Scilly, so I would assume all is well and Rob finally met his family (who had booked into a B&B after his aborted first attempt).
I will probably see him on Monday, when no doubt we will be ragailed by tales of daring do on the high seas.