There’s a Captain Britain (or some other UK based name) for every universe. This is the Prime universe version. Introduced in Captain Britain #1 (1976) (a, for the time, UK exclusive comic) by Chris Claremont and Herb Trimpe, Brian Braddock, twin brother of Betsy Braddock (later Psylocke), is the son of the Otherworld’s Lord James Braddock. While working under Dr. Travis at Darkmoor Research Centre, the lab was attacked, forcing Brain to flee on a bike. Injured, Brian crashed the bike and tried to escape. He happened upon a stone circle where he saw a vision of Merlin and his daughter Roma. They gave him a choice, pick the Amulet of Right or the Sword of Might. Being a scientist, Brian choose the Amulet and became Captain Britain (of Earth-616). He defeated his pursuers and went onto battle many villain, teaming up with Captain America against Red Skull at one point.

He would later go to America and team up with Spider-man against Arcade. (Note: this was the first time American readers even met the, at the time, UK exclusive hero). On his way back home, he suffered from a psychic attack and lost his memories. He was later found by Black Knight and would learn of the Otherworld. He would die during this adventure but was resurrected by Merlin, who gave him his signature costume. He would fight against his Mad Jasper in another universe, which saw the death of Merlin for the first time as well as fighting his insane brother. Some time after he met his future lover Meggan and would eventually give up being Captain Britain after an arguement with his sister. She took up the role of Captain Britain but was beaten by Slaymaster, losing her eyesight.

After believing his sister dead, alongside with the X-men, Brian turned to drinking to with the lost. This scared Meggan who went to Nightcrawler for help. However, she was captured by the Technet, alongside Shadowcat. He would team up with Nightcrawler and together with the 2 girls plus Rachel Summer, the five became Excalibur. He would remain with the team mostly through out it’s initial run and became engaged and later married Meggan. After an adventure involving the Hellfire Club, which he was a member thanks to his family, and later the Crimson Dawn, Brian would later learn of his father’s origin and would become the King of the Otherworld. Believing that his Earth needed a Captain Britain, he test Kelsey Leigh, who choose the Sword instead of the Amulet. This cause him to deny her as Cap Brit but she refused and became Cap Brit anyway.

After M-day, he was tossed back into the Prime Earth without any knowledge of what happened to his wife. He would be visited by his sister, who had just return to life, and the X-men. After battling an evil version of the original X-men, he would join with Dazzler, Nocturne, Juggernaut, Sage and Pete Wisdom to become the New Excalibur. During this team’s run, he learnt that there was a whole other Captain Britain Corps who had chosen the sword instead of the Amulet. Excalibur and this Corps would battle but eventually convinced them to give up after defeating their leader. During Secret Invasion, he would team up with other British hero to prevent the Skrulls from invading Otherworld. These would become MI:13.

He would later be invited to join the Avengers by Captain America and would join the Secret Avengers team. At some point he was reunited with his wife and returned to Otherworld to stop an invasion. He wanted to erase Fantomex from existence but Psylocke made him kill their brother Jamie. After the Revolutionary War, he would join the Illuminati to help them prevent the Incursions. He became the leader of Champions of Europe when Hydra took over America. He would later become a father, deciding to retire allowing his sister to become Captain Britain again. He has since returned as Captain Avalon.

For many, Captain Britain is more famous for being a member of Excalibur. This has lead to him being requested by many X-men fans. Toybiz released a classic figure of him as part of their Walmart exclusive Giant-man series. He would later receive a new figure by Hasbro as part of the Captain America: Civil War Abomination wave. He would later receive classic remake figure as part of the Pulse exclusive Excalibur set alongside his wife, Meggan and Shadowcat.