For ewes (and the ram) I worm with Cydectin LA pre lambing which provides several weeks of persistence, thus reduces worm egg output over the lambing period. Also provides their annual scab treatment (which I used to do in autumn, but didn't see the point in giving them the wormer part in autumn when they didn't need it) (and I don't have a scab problem, I'm just wanting to protect myself from possible diseases from neighbours
).
The lambs I would worm only when required - either scouring or FEC. I wouldn't bother FECing the ewes as it has always come up blank so far. The first couple of times I worm, I would worm all the lambs, from then on it would be only individual animals. I go by the Nadis forecast too to see when the highest risk periods are. I'm working on reducing this by not keeping any individual lambs that scour on more than one occassion.
Worm for tapeworm only if I see tape segments in faeces, usually around May time. This white wormer dose would count as one of the whole-lamb-flock dosings. The other whole-lamb-flock dose would be a different sort of wormer, clear most likely, or yellow.
I fluke everything regularly from Sept/Oct to May as I'm in a wet/risky area.
Rotationally grazed all year.