After a short period of confusion during which they attempted to work out where they had landed, Isabella moved quickly inland, dressed in her widow's clothes.
A number of her key supporters immediately joined her, perhaps having been forewarned of her arrival, including the Bishops of Lincoln and Hereford.
Local levies, mobilised to stop them, immediately changed sides, and victims of the Despensers and relatives of Contrariants flocked to their cause.
By the following day Isabella was in Bury St Edmunds and shortly afterwards had swept inland to Cambridge.
Thomas, Earl of Norfolk, joined Isabella's forces and Henry, Earl of Lancaster—the brother of the late Thomas, and Isabella's uncle—also announced he was joining Isabella's faction, marching south to join her.
On 26 September, Isabella captured Cambridge.

By 27 September, word of the invasion had reached the King and the Despensers in London.
Edward issued orders to local sheriffs, including Richard de Perrers the High Sheriff of Essex, to mobilise opposition to Isabella and Mortimer, but with little confidence that they would be acted upon as he suspected that Perrers detested the Despensers.
London itself was becoming unsafe due to local unrest and Edward made plans to leave.
Isabella struck west again, reaching Oxford on 2 October where she was "greeted as a saviour"—Adam Orleton, the Bishop of Hereford, emerged from hiding to give a lecture to the university on the evils of the Despensers.
Edward fled London on the same day, heading west toward Wales.
Isabella and Mortimer now had an effective alliance with the Lancastrian opposition to Edward, bringing all of his opponents into a single coalition.

Isabella now marched south towards London, pausing at Dunstable on 7 October.
London was now in the hands of the mobs, although broadly allied to Isabella.
Bishop Walter de Stapledon, unfortunately, failed to realise the extent to which royal power had collapsed in the capital and tried to intervene militarily to protect his property against rioters; a hated figure locally, he was promptly attacked and killed, his head being later sent to Isabella by her local supporters.
Edward, meanwhile, was still fleeing west, reaching Gloucester by the 9th.
Isabella responded by marching swiftly west herself in an attempt to cut him off, reaching Gloucester a week after Edward, who slipped across the border into Wales the same day.
Isabella was joined by the northern baronage led by Thomas Wake, Henry de Beaumont and Henry Percy which now gave her total military superiority.

Hugh Despenser the Elder continued to hold Bristol against Isabella and Mortimer, who placed it under siege from 18 October until 26 October when it fell.
Isabella was able to recover her daughters Eleanor of Woodstock and Joan of the Tower, who had been kept in the Despenser's custody.
By now desperate and increasingly deserted by their court, Edward and Hugh Despenser the younger attempted to sail to Lundy, a small island just off the Devon coast, but the weather was against them and after several days they were forced to land back in Wales.

With Bristol secure, Isabella moved her base of operations up to the border town of Hereford, from where she ordered Henry of Lancaster to locate and arrest her husband.
After a fortnight of evading Isabella's forces in South Wales, Edward and Hugh were finally caught and arrested near Llantrisant on 16 November, the same day that the rest of the Despensers were defeated in Wales which brought an end to the insurrection and the civil war.
After a short period of confusion during which they attempted to work out where they had landed, Isabella moved quickly inland, dressed in her widow's clothes. A number of her key supporters immediately joined her, perhaps having been forewarned of her arrival, including the Bishops of Lincoln and Hereford. Local levies, mobilised to stop them, immediately changed sides, and victims of the Despensers and relatives of Contrariants flocked to their cause. By the following day Isabella was in Bury St Edmunds and shortly afterwards had swept inland to Cambridge. Thomas, Earl of Norfolk, joined Isabella's forces and Henry, Earl of Lancaster—the brother of the late Thomas, and Isabella's uncle—also announced he was joining Isabella's faction, marching south to join her. On 26 September, Isabella captured Cambridge.
By 27 September, word of the invasion had reached the King and the Despensers in London. Edward issued orders to local sheriffs, including Richard de Perrers the High Sheriff of Essex, to mobilise opposition to Isabella and Mortimer, but with little confidence that they would be acted upon as he suspected that Perrers detested the Despensers. London itself was becoming unsafe due to local unrest and Edward made plans to leave. Isabella struck west again, reaching Oxford on 2 October where she was "greeted as a saviour"—Adam Orleton, the Bishop of Hereford, emerged from hiding to give a lecture to the university on the evils of the Despensers. Edward fled London on the same day, heading west toward Wales. Isabella and Mortimer now had an effective alliance with the Lancastrian opposition to Edward, bringing all of his opponents into a single coalition.
Isabella now marched south towards London, pausing at Dunstable on 7 October. London was now in the hands of the mobs, although broadly allied to Isabella. Bishop Walter de Stapledon, unfortunately, failed to realise the extent to which royal power had collapsed in the capital and tried to intervene militarily to protect his property against rioters; a hated figure locally, he was promptly attacked and killed, his head being later sent to Isabella by her local supporters. Edward, meanwhile, was still fleeing west, reaching Gloucester by the 9th. Isabella responded by marching swiftly west herself in an attempt to cut him off, reaching Gloucester a week after Edward, who slipped across the border into Wales the same day. Isabella was joined by the northern baronage led by Thomas Wake, Henry de Beaumont and Henry Percy which now gave her total military superiority.
Hugh Despenser the Elder continued to hold Bristol against Isabella and Mortimer, who placed it under siege from 18 October until 26 October when it fell. Isabella was able to recover her daughters Eleanor of Woodstock and Joan of the Tower, who had been kept in the Despenser's custody. By now desperate and increasingly deserted by their court, Edward and Hugh Despenser the younger attempted to sail to Lundy, a small island just off the Devon coast, but the weather was against them and after several days they were forced to land back in Wales.
With Bristol secure, Isabella moved her base of operations up to the border town of Hereford, from where she ordered Henry of Lancaster to locate and arrest her husband. After a fortnight of evading Isabella's forces in South Wales, Edward and Hugh were finally caught and arrested near Llantrisant on 16 November, the same day that the rest of the Despensers were defeated in Wales which brought an end to the insurrection and the civil war.
Invasion of England (1326)