Castle designs through history 
Photographs and brief descriptions of the evolution of castles from earthworks to modern fantasy pastiches.
https://www.exploring-castles.com/castle_designs/

Norman Castles 
Part 1, illustrated with photographs and diagrams, describes what they are and how they came about:
https://englandexplore.com/norman-castles-part-1-what-they-are-how-they-came-about/?utm_source=mailerlite&utm_medium=email&omhide=true
Part 2 describes some of the earliest and best examples of Norman castles in England:
https://englandexplore.com/norman-castles-part-2-some-of-the-earliest-best-castles-in-england/

Motte and bailey castles
Photographs and brief descriptions of several castles in England and Wales, plus a modern European reconstruction of an early motte and bailey design.
https://englandexplore.com/motte-and-bailey-castles/?utm_source=ActiveCampaign&utm_medium=email&omhide=true

Castles of the Welsh princes
Photographs and brief descriptions of five castles built by Welsh princes: Dolbadarn, Dolforwyn, Castell-y-Bere, Criccieth and Carreg Cennen.
https://englandexplore.com/castles-welsh-princes/?utm_source=mailerlite&utm_medium=email&omhide=true

Edward I’s ‘ring of iron’ castles
Photos, brief descriptions and a map of the following castles built at the instigation of King Edward I as part of his campaign to annex Wales, and listed in the order in which the construction of each began: Flint (1277), Hawarden (1277), Rhuddlan (1277), Builth (1277), Aberystwyth (1277), Denbigh (1283), Caernarfon (1283), Conwy (1283), Harlech (1283), Beaumaris (1295).
https://englandexplore.com/edward-i-ring-of-iron-castles/?utm_source=ActiveCampaign&utm_medium=email&omhide=true&utm_campaign=Britcastlesposts#google_vignette

The castles of Tudor History
Ludlow Castle, Hever Castle, Carew Castle, Pembroke Castle, and Leeds Castle all played key roles during the reigns of the Tudor dynasty.
https://englandexplore.com/castles-tudor-history/?utm_source=mailerlite&utm_medium=email&omhide=true

Castles of the Lune Valley
Map, photos and information.
https://bitaboutbritain.com/the-castles-of-the-lune-valley/

Britain’s most unusual castles
Photographs and descriptions of Pineapple Castle, Eltham Castle, Castle Drogo, Wimpole’s Folly, and Kelburn Castle.
https://englandexplore.com/britains-most-unusual-castles/?utm_source=mailerlite&omhide=true

Does a cave beneath Pembroke Castle hold the key to the fate of early Britons?
https://www.theguardian.com/science/article/2024/jun/22/does-a-cave-beneath-pembroke-castle-hold-key-to-fate-of-early-britons

World War I pillboxes in Norfolk
Photos and descriptions of eight concrete pillboxes built in Norfolk during the First World War to defend against German seaborne invasion. All have been granted Grade II listed status.
https://historicengland.org.uk/whats-new/in-your-area/east-of-england/first-world-war-pillboxes-in-norfolk-listed/?utm_medium=email&utm_source=newsletter&utm_campaign=news