dgs: You know full well that ROL were negotiating for a new licence to develop and sell RISC OS 4. If Castle were serious with their accusations, terminating their existing licence would put a brake on things, hm?
Then there's also the source code issue too. As I understand it, Castle asked for the source code to ROL's ROS 4 as per their interpretation of the Head licence. ROL said this interpretation was wrong. If a competitor is demanding your source code, do you carry on working and hope for the best?