T in the Park 2015

In 2014, plans were drawn up to allow the festival to be relocated to Strathallan Castle.[8] This was due to a section of the festival grounds at Balado being situated over the Forties pipeline causing the Health and Safety Executive (HSE) to request for the festival to be relocated away from its previous site at Balado. According to HSE, an accident could result in a large number of casualties and people receiving a dangerous dose of thermal radiation.[9]

Ever since the announcement, concerns have been raised about the new location. A couple tried to take legal action against the move.[10] A group of residents set up the Strathallan T Action Group (STAG) to highlights its concern.[11] Full planning permission became required for the switch from Balado.[12] Two public consultations were held as a result.[13] One of the biggest concerns was the traffic management;[14] Yorkshire-based traffic management experts SEP Ltd. were brought in to help resolve the issues. An SEP spokesman said:

There is a scientific calculation of network capacity and flow rates that can be applied to the road network being used by the event. A desktop modelling exercise has been performed and it was successful. We are confident of our plans and are extremely experienced in managing traffic plans in rural areas. Road safety is of the utmost importance to us and consideration is being given to this. Speed reductions will be in place on certain key roads around the event, as well as other measures.[15]

In February 2015, a pair of ospreys returned to their long-term roost despite attempts to usher them to a new custom-built nest. It is understood that the ospreys' return to their former home means a buffer zone of 2500 ft will likely be required to safeguard them during the three-day festival encroaching significantly on the proposed festival site. A spokesman for RSPB Scotland said the wildlife organisation was "fully satisfied" the birds had returned to the old nest. This was disputed and the police were called after DF Concerts tried to divert the birds to the new nest by using balloons, flags, and a cherry picker which RSPB Scotland condemned as unethical and unacceptable, although not illegal. James Reynolds of RSPB Scotland said: "We are aware that the ospreys have been reported at the nest site and indeed we have some video footage that shows one of them alighting on the nest with a stick". A T in the Park spokeswoman denied any wrongdoing.[16] Shortly after the event RSPB Scotland stated the Strathallan Estate's ospreys were fine A spokesman said: “The ospreys were closely monitored over the weekend and both adult birds are still present at the nest site with their chicks, and behaving normally.[17]

The event was finally approved in May despite 1,600 letters of objection sent to Perth and Kinross council.[18][19]

The first headline act to be announced were The Libertines and shortly after other headliners Kasabian and Noel Gallagher's High Flying Birds, along with other acts including Jessie J, Avicii, Hozier, Sam Smith, The Vaccines, and Twin Atlantic.[20]

[21][22]

On 11 July 2015, a 36-year-old man died at the festival, with his body discovered in toilets. A T in the Park spokesman said: "We are extremely saddened by this news, and our thoughts are with the family at this time." He said the organisers were helping police with their inquiries. The Police treated his death as unexplained but not suspicious.[23][24]

The number of arrests reduced to 44, which was significantly less than 2013 where there was 91 arrests, while the number incidents dealt with the Scottish Ambulance Service were also down to 606 compared with 858 in 2014.[25]

• List of music festivals in the United Kingdom