There is much more [than deft scoring] to a piece such as Slippage by Morgan Hayes - a microtonal, complexly rhythmic octet in which an eruptive piano solo slips out of the 'geological' layers in which it had been embedded... His idiom with its skewed interplay of lines evokes that of his teacher Michael Finnissy but only as a background against which a new harmonic sweetness and approach to form define themselves.

Paul Driver, The Sunday Times, 18 April 1999