There's a really loud high pitch noise coming from somewhere behind the houses at 137-151 Landells Road or maybe Crystal Palace Road I think. Maybe a fox scarer or possibly a power tool? It was present yesterday until about 6pm and then it started today at 11am and is continuing. Timings would suggest a power tool from a labourer but can't see anyone using such a tool. It is very very loud, almost continuous and annoying especially as we have to leave the doors open because of the heat. Does anyone know what this is? Someone reported it to Southwark council and they are trying to track the source of it as well.