Odd behaviour indeed.
IMO you should report it, even if you don't think anything has been tampered with under your truck .... next time someone may not be so lucky.
Or this person may need medical help ... either way better safe than sorry.
I must be honest and say that, although I have heard of the R Itchen, I didn't know what County it was in ....I would be hopeless in a pub quiz LOL. :p
LOL
That is Oliver(Ollie), we were only meant to "babysit" him for one night (we were dog foster parents)
One night turned into a week and then, would you know it .... we adopted him :)
He is just too darn cute LOL