On 25th May 1306, John de Warenne, 7th Earl of Surrey, and owner of Sandal Castle, married eleven-year-old Joan of Bar, daughter of Henry III, Count of Bar, and Eleanor of England, eldest daughter of Edward I. De Warenne’s troubled marriage to Joan bore no children but he had several illegitimate ones by his mistress, Matilda de Nerford. He began divorce proceedings against Joan in February 1316 but there is no evidence this was completed. He tried for many years to divorce Joan, even citing he had had an affair with Edward II’s sister (Joan’s aunt), Mary, a nun. Near the end of his life, he took another mistress, Isabella Holland, sister of Thomas Holland, later Earl of Kent. His will included:
“I bequeath to Isabel de Holand, my compaigne, my gold ring with the good ruby, the five gold rings placed as stars which are in my golden eagle, so that she put other rings in their place, such as she shall please, the complete principal vestments for my chapel, with the complete fittings for the altar, my censer of silver gilt and enamel, my golden cup with a little [English: “Ewer”] of silver gilt, all my beds, great and small, except those which I have bequeathed to othera [sic, plural], the great dish, the silver pot for alms, three plates for spices, all my vessels of plain silver, as in dishes, saucers, basins, washing dishes, chargers, cups and goblets, except those which I have bequeathed to others in this Testament,”

The Chronicle of Lanercost records that: ‘Louis de Beaumont, Bishop of Durham, [died] … In his place the monks of Durham elected one of their con-fraternity, Sir Robert of Greystanes, a man in every respect worthy of such a dignity and a doctor of sacred theology. When he came before the king and besought his grace for the baronies and lands belonging to the bishopric, the king received him graciously enough ; but in the end replied that he had sent his own clerk. Master Richard de Bury, Doctor in Theology, to the court of my lord the Pope upon certain important affairs of the realm, and that among other things he had requested him that Richard might be made Bishop of Durham ; but, in the event of his not obtaining what he asked from the Pope then he would willingly grant him [Robert] all the grace he craved. This reply notwithstanding, that monk went before his Archbishop of York, was consecrated by him, was afterwards installed, received the submission of the clergy of the diocese, and performed other acts pertaining to the office of bishop. After this, the aforesaid Master Richard returned from the Pope’s court bringing with him to England a bull wherein it was set forth that the Pope had granted him the bishopric of Durham, and that he might be consecrated by any bishop whom he should choose. And consecrated he was in England, but not by the Archbishop of York. Thus were there two bishops consecrated for one bishopric ; but one of them, to wit the monk, shortly after went the way of all flesh ; whereby Master Richard remained as Bishop of Durham, and held a most solemn festival on the day of his installation, to wit, the fifth day of June in the year 1334. My lord the King of England was present, also the Queen, my lord King Edward of Scotland, two English earls, to wit, the king’s brother the Earl of Cornwall and the Earl of Warenne (owner of Sandal Castle) four Scottish earls, the Archbishop of York, the Bishop of Carlisle and a great multitude of clergy and people.’

The Chronicle of Lanercost records that on the 17th July 1328: The ‘young king [Edward III] gave his younger sister, my lady Joan of the Tower, in marriage to David, son of Robert de Brus, King of Scotland, he being then a boy five years old. All this was arranged by the king’s mother the Queen [dowager] of England, who at that time governed the whole realm. The nuptials were solemnly celebrated at Berwick on Sunday next before the feast of S. Mary Magdalene. The King of England was not present at these nuptials, but the queen mother was there, with the king’s brother and his elder sister and my lords the Bishops of Lincoln, Ely and Norwich, and the Earl of Warenne (owner of Sandal Castle) Sir Roger de Mortimer and other English barons, and much people, besides those of Scotland, who assembled in great numbers at those nuptials.’

Around 14th June 1317, the people of Bromfield and Yale, in North Wales, wrote to their lord, John de Warenne ,Earl of Surrey and owner of Sandal Castle, to tell him that they had been threatened by Thomas of Lancaster, lord of Pontefract, who had written to them to say that he meant to have their land and that if they behaved well towards him he would be a good lord to them, but that he would have the country ‘une manere ou autre’. They appealed to Warenne for help, saying that they could do nothing against such a great power and begged him to ask the king to order the Justices of Wales and Chester and the sheriffs to go to their aid. De Warenne forwarded a copy of this petition to the King on 14th June, expressing surprise that the Earl should act in this way. He asked for speedy help from the justices and the king’s men in those parts for the defence of his lands and the king’s honour. A minute of the council’s decision on the matter survives. De Warenne was to be told to go to Bromfield to guard his own lands if he wished, while Lancaster was to be informed of de Warenne’s message to the king and ordered to refrain from breaking the peace in that region; letters close to this effect were sent to Lancaster on 16th June.

A tournament provided an ideal opportunity to convene large numbers of magnates and knights without arousing suspicion, but it was also of concern to a ‘beleaguered’ monarch. On 14th June 1309, letters close were issued to the following six Earls, and to no others, forbidding them to tourney: Gloucester, Hereford, Warwick, Lancaster (of Pontefract), Warenne (of Sandal) and Arundel.

On 25th April 1341, Archbishop Stratford of Canterbury, was refused entry to Edward III’s parliament in the Painted Chamber at Westminster, sparking the so-called ‘Crisis of 1341’. Stratford had lambasted the king for his ‘tyrannical’ behaviour and forbade the payment of clerical taxation; even threatening excommunication. Edward had charged the archbishop with treason and informed the pope that the archbishop’s exile was being considered. John de Warenne, 7th Earl of Surrey and owner of Sandal Castle, bravely smoothed the way for Stratford’s welcome back into the king’s favour by arguing that the parliament as then constituted was illegitimate as some attendees should not be present and some who should be leading proceedings were barred.

On 2nd December 1307, John de Warenne, 7th Earl of Surrey and owner of Sandal Castle, opposed Piers Gaveston, Earl of Cornwall, and court favourite of Edward II, at a tournament at Wallingford. Later, after Gaveston’s execution, Edward II forbade de Warenne to attend tournaments at Newmarket on the 17th January 1313 and Brackley on the 16th September that same year.

In October 1310, Edward II decided the time was right  to deal with the deteriorating military situation in Scotland. In February 1310, the Lords Ordainers had been established: a diverse group of twenty-one elected by an assembly of magnates. They consisted of eight earls, seven bishops and six barons, their natural leader being Henry de Lacy, Earl of Lincoln and Baron of Pontefract. Probably deciding a Scottish battlefield was a safer place for Gaveston than a meeting of English magnates, Edward II headed north. However, hardly any nobles were prepared to support him; the only exceptions being the Earl of Gloucester and John de Warenne, the seventh and last Earl of Surrey and owner of Sandal castle.

On 27th September 1304,  John de Warenne, 6th Earl of Surrey, died at Kennington in Kent, soon after returning from Scotland, and was interred at Lewes Priory with the service conducted by the Archbishop of Canterbury. John, the son of William de Warenne and Maud Marshall, had taken ownership of Sandal Castle in 1240 and would marry Alice de Brun de Lusignan in 1247, which would cause resentment amongst other nobles as she was penniless. On his death, his grandson, John de Warenne, would take ownership of Sandal becoming the 7th and last Earl of Surrey.

On 29th August 1319, John de Warenne, 7th Earl of Surrey and owner of Sandal Castle, entered Scotland with Edward II on his unsuccessful campaign to repel the advance of Robert the Bruce into England.