The incident happened yesterday at around 9:20am when the victim was approached in Embercourt Road.
He was threatened with weapons, before the contents of his van were stolen.
20 minutes later, suspects driving a dark Audi A3 targeted another delivery van driver in The Parade at Sunbury Cross.
They then switched cloned plates and targeted yet another delivery van driver at around 10:05am in Trinity Close in Stanwell.