Dolphins Swimming in Thames

Problem is most of them come to grief when they come down river .I don't imagine we will be seeing sharks anytime soon.

Dolphins are native in Britain so this isn't unusual. And there are plenty of species of shark, so I wouldn't be surprised to find them there either.

I’m sure there’s always been occasional instances of dolphins in the thames over the years.

They say the Thames has been getting cleaner in recent years and long gone wildlife has been returning, maybe the answer is that simple.