Albert Goodge, as mentioned in the novelisation
Talk about it here.
Albert Goodge was a technician at the Beacon Hill Research Establishment at time of the second Nestene invasion of Earth. He expressed regret at his wife Elsie's fondness for including boiled eggs in his packed lunch, even on the day of his demise.
As part of his scheme to bring the Nestenes to Earth, the Master briefly took control of the radio telescope. He killed Goodge using the TCE. Goodge's shrunken corpse was left within his own lunch box for the Third Doctor to discover. (TV: Terror of the Autons)