Henry VII had successfully established the monarchical authority by 1509. How credible is this opinion?

To build a successful dynasty, the Earl of Richmond had to overcome numerous obstacles, after defeating Richard III at the Battle of Bosworth, on the 22nd August 1485. Realising he had only his living mother and ally, Margaret Beaufort as the only direct blood-line from Edwards III, to truly secure his claim to the throne. The newly crowned king would have to invent ingenious ways to placate the continuous Yorkist’s threats. King Henry’s first important task, was to change the date of the Battle of Bosworth, from the 22nd to the 21st August. Just by moving the date by one day, Henry was able to accuse those who fought at Bosworth, alongside Richard III of treason. As a result, the new king managed to push through parliament a key legislation, such as the ‘Act of Attainder’. This resulted in landowners guilty of rebelling against the Lancastrian monarch, lost their titles; even their heads maybe!

It was quite clear, that Henry Tudor feared the nobles, and had a deep-seated mistrust in them, as they still dominated landownership, and many were Yorkist sympathisers. Unlike his predecessor Edward IV and his successor Henry VIII, King Henry was reluctant to create new peerage titles. However, Henry VII had important and current figures to contend with. You could argue, the king kept his friends close, and his enemies even closer. Following the Stafford’s rebellion in 1486 in the North Riding of Yorkshire and the Battle of Stoke Field in 1487, Henry re-instated, and entrusted the 4th Earl of Northumberland(Henry Percy) to neutralise the North(Yorkist-Stronghold). This former Yorkist duties would be to collect debts and taxes, following the