This citation is taken from Bull. London Math. Soc. 12 (1980), 78-80.

DR. P. J. CAMERON 

Dr. Cameron's research has ranged extensively over those areas of group
theory and combinatorics that interact with each other. By ingenious use
of the appropriate graph-theoretic techniques, he has simplified and
greatly increased our understanding of suborbits in simply primitive
permutation groups (Bull. London Math.  Soc, 1 (1969), 349-352; Proc.
London Math. Soc. (3), 25 (1972), 427-440; Bull. London Math. Soc. 6
(1974), 136-140, and several papers published elsewhere). His work on
multiply transitive permutation groups, designs and parallelisms provides
a good example of how two subjects can influence each other both directly
and by the suggestion of problems and methods in the one area by analogy
and comparison with the other (J. London Math. Soc. (2), 6 (1972),
122-128; Math. Z., 128 (1972), 1-14;  Math. Z., 157 (1977), 101-119;
"Parallelisms of complete designs", L.M.S. Lecture Notes, Vol. 23, 80
1976, and several other works). His fruitful collaborations with J. J.  
Seidel, J. M. Goethals, W. M. Kantor and several others have produced deep
theorems on strongly regular graphs, rank 3 permutation groups and various
finite geometries.  The success of this work is illustrated by the
solution with W. M. Kantor of the old problem of finding all 2-transitive
groups of collineations of finite projective spaces. The Junior Whitehead
Prize has been well-earned by Dr. Cameron for his success in identifying
significant problems that are ripe for solution, for his ingenuity in the
application of techniques from various parts of mathematics, for his great
expository skills and his highly developed style.