 Complete the following phrase:  The festival was filmed and highlights were shown on late night broadcasts on Channel 4. Notable moments included Coldplay covering Lou Reeds 1972 song Perfect Day during their Sunday night headline performance after the ex-Velvet Underground frontman failed to play it in his unpredictable set earlier in the day. Coldplay singer Chris Martin told media that Lou Reed had asked them to do the cover to placate the crowd. The Sunday also saw Procol Harum return to the festival for the first time since they played at the original version of the festival in 