So I managed to keep lethargy at bay and got out to complete operation pootle. I managed - yet again - to pick a short section of unimaginable bogginess amongst what was otherwise mostly solid terra firma. (Okay, it wasn't that unimaginable but it was slippy as a Hagfish whose slime glands had cranked into overdrive).
Overall, it was the first run during the last week where I very nearly almost felt like I actually managed to run a bit here and there. Granted, the last 2-3km being slightly downhill helped a lot, but even so, it felt pretty good.