I kind of do what Rosemary does. We take the tups out after four weeks and they stay together and with any meat boys for the rest of the year (we like our lambing to be as short and compact as possible). The females all go back together after tupping time, except a handful of ancient unbred pet biddies who need extra feeding (no teeth). Any ewe hoggs (ie this years ewe lambs now weaned) spend the winter with the bred ewes. This does mean that they can get a bit more feed than they would get if they were on their own, but we've never had a fat Heb yet
Another advantage is that at lambing time the ewe hoggs see what it's all about which seems to prepare them rather better for the following year when they have their own lambs.
Although Hebs are seasonal breeders I would never trust that to be the case with tups around - if they are together, the little ones will be tupped
Whether they take is a different matter, but I certainly wouldn't risk it.
If you keep the tup in with the ewes then you can't feed ewe pencils - we don't use those anyway and the coarse mix we do use is suitable for tups too. However, once they have recovered from their tupping activities, tups don't need the quantity of concentrates that bred ewes do.
I find it works out well with the males. The male lambs are weaned in mid August, from an April lambing (ie at 4 months) and go in with the tups, where they stay until they go for slaughter the following early August (16 months). That then gives the grass a couple of weeks to grow before the next lot of tup lambs join the stock tups. We have several stock tups so they are never on their own either.