In reward he was granted the title of Earl of Northumberland and the Baronies of Percy, Poynings, Lucy, Bryan, and Fitzpane were restored to him, on 1 May 1557.

[2] He was installed at Whitehall with great pomp, and soon after was named Warden General of the Marches, in which capacity he fought and defeated the Scots.

[1] Their children included: After the Rising of the North failed, Thomas fled to Scotland, where he was captured by the Earl of Morton, one of the leading Scottish nobles.

Margaret Erskine wrote that her son, the Laird of Lochleven, was at Loch Leven, "and it is all frozyn, quha (who) is at greitt charges by resoun of grett company in his houss daylie for the keiping of my Lord of Northumberland".

He was conducted to York and on 22 August 1572 was beheaded at a public execution on Pavement, refusing an offer to save his life by renouncing Catholicism.

[6] As his only son had predeceased him without male issue, the earldom passed to his younger brother Henry Percy, 8th Earl of Northumberland.