William might have gained control of the Earldom of Wessex but Edwin (Earl of Mercia) and Morcar (Earl of Northumbria) were the two next strongest Earldoms representing over half the country
Strength
The earls and other leading noblemen had rallied around Edgar, who had a much better claim to the throne than William
Weakness
Although London was a stronghold, William's route threatened to cut it off from reinforcements from the North
William may have spotted weaknesses in the defences making him take this route
Weakness
Battle of Hastings was a crushing defeat with the best warriors in England being killed
Many Anglo-Saxons believed that God had decided to punish England for being sinful
Weakness
Edgar had only recently arrived in England, without ready-madesupport
Took no decisiveaction as King
Most likely because the earls and himself could not agree on what to do