Complex sentence: Grantham was born in Camberwell, London, the son of Adelaide (née Flinders) and Walter William Grantham (1915--1998), and enlisted in the Royal Fusiliers regiment of the British Army in 1962, at the age of 15.
Split into simpler sentences: Grantham was born in Camberwell, London, the son of Adelaide (née Flinders) and Walter William Grantham (1915--1998). He enlisted in the Royal Fusiliers regiment of the British Army in 1962, at the age of 15.