Manchester council says the discovery of peregrine falcons nesting in the town hall should be celebrated despite delaying the building's restoration.Having at one time been close to extinction in the UK, the bird of prey’s numbers are now increasing as the protected species have adapted to nest on tall buildings.It is the first time in several years that the birds - the fastest animals on Earth - have made the town hall’s clock tower their home.Peregrines are provided with the highest category