"first and last 40km 'flat' "
Sorry to mislead. First 18km and last 22km ETA: were along the Exe valley/estuary: so 1500m in 62km: almost up to
@Sea of vapours 'hilly' standard. Have checked more carefully and looks like about 1350m in 58km (Garmin algorythym).
Was still much hillier than we planned - navigational inexactitude, and really not caring where we went.
Highlights: spotting a furry caterpillar on the wall of a tyre as I crawled up a climb; looking across a valley saying 'I wonder if that's the top of the climb, looks steep (10 minutes later this was confirmed after 110m in 900m); and finding a signpost starting with 'W' (our Wednesday evening 'ride to the pub' group is on the third alphabetical hunt: first pubs, then villages, now signposts. The grass round the signpost had been trampled down. Turned out another in the group had been out to 'get it' an hour before. Little things to keep one amused.
And I always shout 'all OK' if I pass a cyclist that's looking they might have a problem. Usually 'No, fine.'
However, passing through town at exactly 100km, bloke outside the (closed of course on Sunday) bike shop. "You OK?" "Nope: snapped
chain" Chain tool and quick link out, check chain long enough still for large/large, push out a link, install quick link, refit chain, "Ride on!" Thankfully chain was clean/new(?) and unoiled.