Peter Hawkins was a Dalek voice in the first Dalek serial - The Daleks - in 1963/1964, in Dalek Invasion of Earth, 1964, Dalek Masterplan, 1965/1966, The Power of the Daleks (1966) and The Evil of the Daleks (1967).

Dalek Invasion of Earth

Dalek Masterplan

Power of The Daleks

Evil of The Daleks

He was a cyberman voice in The Tenth Planet (1966), The Moonbase (1967), The Tomb of the Cybermen (1967) and The Wheel in Space (1968)

The Moonbase

The Tenth Planet

Tomb of The Cyberman

The Wheel in Space

In the Dalek Masterplan episode, Devil's Planet (November 1965) he also provided the voice of Marc Cory.