It makes perfect sense to me that road running is good for your achilles. Road running is a flat, hard, non-slip surface that repeats with every footstrike. Achilles don't like sudden jerks (think uneven surfaces, slipping around) or taking too much load - running on your toes, like you do going up hills or running fast.
Thanks. Well, previous Achilles injuries have been caused by hard surfaces, so this one is the opposite.
I seem OK at running uphill on toes - bizarrely .
I shall run a bit today & then see physio straight after - see what he says. I'm not severe enough to miss Cannop Ponds CSC heat on sunday, but I will sacrifice my sub-18 minute parkrun attempt on Saturday! (which paradoxically would have probably caused me less / no pain.....) (but a drubbing on here for risking aggravating it!) :)