Just because Bateman has left, doesn't necessarily mean space on the cap, or at least not a lot.
It seems it's been on the cards for a while, as Franny mentioned somewhere that Bateman's departure was in mind when they signed Winterstein. Since the Winterstein rumour started ages ago, it's logical to assume the Bateman departure has been expected for a while too. With that in mind, the signings of Winterstein and Henry may have used Bateman's cap space.
Pure guesswork though, and it may not be the case, it may in fact be we have space.
I wonder if Matt Cook is worth a place in the squad. The only place we are really lacking in cover is prop. A couple of injuries there and we're looking at moving players. Cook has been playing prop for at least the last 12 months for London and would count as home grown. Certainly not the best player in the league and not someone who we would want as a first choice, but as a backup squad player in case of injuries, he may be worth a go considering he wouldn't likely command a large wage.
Edit: Ignore previous part, Cummins pretty much says there is room for further signings in this morning's T&A piece.