Greenslade are an English progressive rock band. They originally formed in the autumn of 1972 (making their live debut at Frankfurt's Zoom Club in November) with the following line-up:

Longtime musical associates, with a common background in jazz, Greenslade and Reeves had been original members of Colosseum. The two decided they wanted to form a band with two keyboardists. At the time, Reeves was A&R director for the independent progressive label Greenwich Gramophone Co., and he invited Dave Lawson of Samurai, a commercially struggling act with the label, to become part of the group. Lawson was previously a member of The Alan Bown Set and Web, whilst McCulloch was briefly a member of King Crimson and Fields.