Author note: this is a sketch of an althist, not a fully-envisaged one. It's most likely that history would not have proceeded down this route even if the POD occurred at all. I'm trying to keep history roughly in line with ours, for the sake of simplicity, rather than exploring every butterfly.
- Due to the amount of available land, and closer relations to the Gallic tribes, British tribes are slightly more centralised in organisation than their OTL counterparts.
- Pytheas' expedition to Britain was not viewed on with as much skepticism as OTL. Greek settlers were already dimly aware of the island through hearsay that had reached colonies in Massillia. Furthermore. Pytheas decided to explore Britain more closely rather than sail to 'Thule', and from that experience make claims that his fellow Greeks found hard to believe (confusing pack ice for jellyfish, and not seeing the midnight sun). He was subsequently better remembered throughout history and inspired several more expeditions to Britain, though no attempts at colonisation were made.
- The information gathered allows Julius Caesar to make a more calculated invasion of Britain during his conquests. His initial venture in 55BC causes him to ally with the Iceni clan in Norfolk; when he returns in 54 BC, he conquers all of OTL East Anglia, Kent and Surrey, then departs via the 36-mile crossing to Iberia.
- The conquest of English and Welsh territory begins roughly the same time as OTL, and proceeds to similar success. However, as the Iceni were one of the first peoples subjugated, Bodicea never becomes the threat she was in OTL, and subsequently there is no revolt. Colchester remains the capital of Roman Britain, due to its strategic position located at the midpoint between the Norfolk-Brest and Kent-Lugo crossings, as well as commanding position over the Gulf of Biscay, a Roman lake.
- Viking colonisation is strong in OTL Scotland and raids are present along the coast of the English nations. However, as the Gulf of Biscay is something of a Christian lake, due to it being enclosed by Christian England, France and Spain, it has reasonable security against the pagan invaders.
Early modern era
- Netherland troops invovled in the Armada were moved to Brest in anticipation of the invasion. After the fleet's defeat it attempted to flee there, and due to distance managed to arrive safely. However, a subsequent invasion attempt through the Wash was botched and the survivors - and the troops - were annihilated.