Yeah, the explosion in numbers has been rapid, and they hang out in groups and can be real bullies to other birds so they'll definitely have an impact.
On the upside, they're also increasingly supplementing the food supply for peregrine falcons in London (they're apparently easier targets than the pigeons...
On the upside, they're also increasingly supplementing the food supply for peregrine falcons in London (they're apparently easier targets than the pigeons...