I think Richey is dead. Occam's razor and all that. From everything I have read about him and what I have heard from people who actually met him, he was clearly not a well man at all. I have seen the conspiracy theories and stuff, but I don't give it much credence. Like other common suicide points such as the Humber, the Severn is strongly tidal; some bodies are found, others are lost forever, which just fuels the conspiracies and adds to the anguish of the loved ones. I am local to the Humber and basically once a body is past Spurn Point, it's lost to the open water, especially if the tidal times are 'favourable' for it. I imagine the Severn has a similar point.