On the story of the Spitfire I remember the mighty Eric Brown talking about having fun with an unidentified one of those. He flew it under the Fourth Bridge. As you do. I think it was about 1942.
Many people complained to the local police (which I find suprising in wartime). And they apparently spent quite a lot of time shouting at the local RAF bases, whose officers I'm sure then spent a lot of time shouting at each other. But the culprit could not be found.
Nobody asked Brown, as nobody knew the Navy had any Spitfires, so the police didn't bother asking them.
Although I still have to say my favourite story about him is that he subsidised his motorcycle while still at school by doing the Wall of Death at weekends. And one performed this stunt in a motorcyle and sidecar, with a lion sitting in the sidecar. History does not record just exactly how pissed off the lion was about this...