only doable on really quiet days…
…cause it’s all pretty major roads. A36 to Warminster, A362 to Frome, A361 to Shepton Mallet, A371 to Wells, A39 back to Bath. The climb out of Wells is the only really long one (not counting the Wellsway back up to your gaff!) though the elevation map is more upsy-downsy than the ride felt. there’s the climb on the A36 from brassknocker but that’s right at the start so you’re fresh, and a couple of other shorter ones.