Flamstead was held by Aki, a thegn of King Edward, in 1066, and by Ralph de Tosny in 1087. It was assessed at 4 hides before the Conquest and at 2 in 1086. The population listed was 22 villans, 7 cottars and 4 slaves, suggesting a population in the region of 150, and the manor included woodland for 1,000 pigs.
The manor descended in the direct line until the death of Robert, Lord Tony, in1310. No tenants are recorded in the 12th – 14thc.