Complex sentence: As the last surviving subject of the program, he was a consultant to writer Andrew Birkin for the 1978 BBC mini-series "The Lost Boys", in which he was portrayed at various ages by Stephen Mathews, Jason Fathers, Matthew Ryan, and David Parfitt.
Split into simpler sentences: As the last surviving subject of the 1978 BBC mini-series "The Lost Boys", he was a consultant to writer Andrew Birkin. In the program, he was portrayed at various ages by Stephen Mathews, Jason Fathers, Matthew Ryan, and David Parfitt.