David John Greenslade (born 18 January 1943) is an English composer and keyboard player. He has played with Colosseum from the beginning in 1968 until the farewell concert in 2015 and also from 1973 in his own band, Greenslade, and others including If and Chris Farlowe's . Two more solo albums appeared, Going South and Routes/Roots, in 1999 and 2011 respectively.