This implies that he was the king BEFORE Bosworth and anyone who fought against him could be considered a traitor to the crown and he could punish them accordingly.
The date he said his reign began on: 21st August 1485.
The Battle of Bosworth: 22nd August 1485.
How did Henry consolidate his power (2)?
Punished traitors in different ways.
One of these ways was with 'Retaining', using the Act of Attainder.
This was a piece of legislation that could be used to formally declare somebody guilty of a crime.
This was almost always members of the nobility, who had fought against Henry at Bosworth.
How did Henry consolidate his power (3)?
He made sure that his coronation was before the first time he called parliament (and before his marriage, so that his claim couldn't be down to his wife).
His coronation: 30th October, 1485.
First time he called parliament: 7th November, 1485.
This signified that his power came from the monarchy, NOT the parliament - symbolic of him being the rightful king.
How did Henry consolidate his power (4)?
Imprisoned those with a Yorkist claim. Most notably: The Earl of Warwick and Elizabeth of York.
A year later, in 1486, Henry married Elizabeth and united the House of York and Lancaster.
When Prince Arthur was born in September, 1486, this help to establish Henry VII's dynasty.
How did Henry consolidate his power (5)?
He publically awarded his supporters to increase his popularity.
He issued eleven knighthoods to the nobility who supported him.