Result

• Harold betrayed Tostig
• Harold wanted to be king - he needed strong forces to protect England from the Normans (war with Mercia and Northumbria would weaken defences)
• Harold's betrayal kept the earls on his side
• Tostig was a threat to the throne - he could also be king
• Tostig got exiled (kept him out of the way for Harold)
• Harold and Tostig were now enemies
• Tostig wanted revenge