Wasps would have to show how they'd been damaged and would sue for what they claimed they'd lost. There is also the possibility that the NDA contains an amount to be paid if it is broken.
They can't just break the NDA. They have other business interests apart from us, breaking it would not look good for them whatever the reason. Plus breaking the NDA would mean wasps could sue them for damages.
McFadzean has concussion and so probably just needs rest and Allen has done his ankle so is probably in a protective boot. Not practical for them to travel. Rose and Dabo are both walking around so fine to go and keeps them involved.