In 1340, the Monthermer {Monte Hermerii} family was supposedly granted, by Edward III, a Royal licence to crenellate (Warblington Castle, Havant)

Currently no primary source supports this claim of a licence to crenellate.

No mention of this in VCH. Not in the rolls. Salter writes granted by Edward III to the Monthermer family in 1340's. Edward de Monthermer died, without male issue, in February 1340, his brother Thomas died later the same year and the barony became extinct. Rejected by me on the grounds of no supporting evidence.

Significant later source are;

• Salter, Mike, 2002, The Castles of Wessex (Malvern) p55
• Barron, W.G., 1985, The Castles of Hampshire and Isle of Wight (Paul Cave) p50

More details about licences to crenellate can be found here.

Please let me know if you see any errors, can add information or can otherwise help to improve this resource. Contact me