Ok, here's a teaser for you:

Where would people place their bet on the chance of finding a genuine wild brook trout nearest the centre of Birmingham? How far out would you have to go?

I remember seeing a TV prog about a year ago about someone looking for such a thing in London - I think he eventually hooked one in some overgrown stream just inside the M25.

Guess you are refering to brownies!!!!.
I understand that there are a few to be had around Droitwich

Best I've done out of Sutton park was three brownies over a pound in an afternoon, with the biggest of them just shy of two and a half pounds. As the same stream runs out through Pype Hayes, I've no doubt that there are fish to be has along it's whole length.

I've had chub, roach and rudd on dry flies from the Tame near Spaggetti Junction. I've not seen any trout in the Tame but if there's a clean tributary to have seeded it or if it's been stocked, i don't see any reason why they shouldn't be there. My best bet for a tributary with trout would probably be the streem running out of the old St Margarets hosital site in Perry Barr.

Bourne brook and the river Rai are both close to the city centre but historically, both have been severely poluted and although it's possible that they've come back from the dead in the same way as the Tame or Kidderminsters river Stour, I rather doubt it.

As said, there are brownies rather than "brook trout" which are a noth American species.