Bosses revamped the Strathallan Castle site in Perthshire after learning of the presence of the protected birds.

Environmental manager Steve Taylor says, "We have adjusted two things - the construction timetable and the layout of the site. The ospreys become more sensitive at certain periods of time, such as when their eggs are hatching.

"Once the chicks have their feathers and they can leave the nest we can make a bit more noise and be more relaxed. But at the moment we are being very sensitive and have adjusted the construction schedule so that noisy activities are not taking place in the zone closest to the osprey's nest.

"Obviously the construction people want to get in and work but they have all agreed they will work within that remit. We've also moved the main stage and reoriented it, which is a major contribution to the osprey protection plan. Now it has moved further away, it is well away from the buffer zone."

This summer's (15) T In The Park festival will be its first at Strathallan Castle after spending almost two decades at Balado, near Kinross. This year's headliners are Kasabian, The Libertines and Noel Gallagher's High Flying Birds.