几个月后，伯蒂与伊迪丝又在伦敦意外重逢。讨论了两人在布兰克斯特的会面之后，伯蒂邀请伊迪丝去喝上一杯。伊迪丝刚刚解雇了她杂志社的编辑斯金纳先生，and then meets Bertie to tell him she is on a tight schedule at the magazine as they need to get the articles edited and printed by four o'clock the next morning. Bertie, though having planned to ask her to dinner while having drinks, immediately offers to stay up late and help her.
Fortunately after hours of working hard to get articles and pictures typed, printed and published, the work gets done and it is delivered. Edith and Bertie then sit down and talk about Edith's new life and purpose of being an editor. Edith thanks Bertie and is grateful for his help. He says that Edith inspires him, something which Edith says no one tells her. After that Edith and Bertie have coffee where he says he needs to go home and Edith needs to find a new colleague to replace Skinner before she herself goes home. But instead of feeling sad, Edith remarked that they just edited a magazine to which both smile.
Edith and Bertie meet in London where they share some personal stories, and then have tea in Edith's flat where they share their first kiss. He admits to Edith that he liked her and couldn't stop thinking about her. She says he is very sweet and Bertie admits that he has not got much to offer Edith but she says he has but she is not sure if she is worthy of it but she tells him that she just wants to have a good dinner and dance and he smiles. He picked the restaurant Cafe de Paris because Edith liked it.
Edith invites Bertie to Downton's Open House. Edith meets Bertie at The Drive, where they share their second kiss. Before dinner, Edith shows Bertie Sybbie George, and Marigold. At dinner, Bertie realizes that the family do not have a plan for the Open House, so he quickly devises one.
He later came with Crawleys to watch Henry Talbot and Charlie Rogers race at Brooklands with Edith but the event ended tragically with the death of Rogers, whom Bertie identified to Edith and her sister when she asked him who was killed. He later spends time with Edith at the drawing room at Rosamund's house where he admits he loves Edith and proposes marriage to her. Edith is delighted but she has yet to give him a proper answer but she asks if she can take Marigold, without revealing the real truth why so she just puts it off that she is very fond of her and Bertie says yes but he would also like for them to have their own children in the future and Edith complies. They then kiss before Bertie goes.
His cousin, Peter, dies in late July/August 1925 and Bertie succeeds to the title of Marquess of Hexham, becoming the seventh. Soon after the former Lord Hexham's death, Bertie stops at Downton Abbey at Edith's invitation on his way down south to Lord Hexham's deathplace in Tangiers. Bertie has decided to not disturb his cousin, who had already been buried, but will settle his affairs in Tangiers then return home and have a memorial service, to which he hopes Edith will attend.
Bertie eagerly awaits an answer to his proposal, but Edith hesitates due to her having to eventually tell him about Marigold's true parentage. He explains to her he is nervous about his new position and wants her by his side to help him through it, hinting that his widowed mother, the only family he now has left, does not have much respect for nobility.
伯蒂与伊迪丝在伦敦丽兹酒店重逢，这场会面是玛丽与姑妈罗莎蒙德安排的。伊迪丝再次见到伯蒂感到惊喜，但同时又有点失望。Edith revealed to Bertie that he broke her heart and that Marigold is still a threat and that Bertie's mother wouldn't accept her for it. However Bertie revealed that ever since he broke up with Edith, he has not been managing well and indirectly reveals that he wants Edith back and also wants to marry her. With their engagement back on, Edith along with her parents, Lord and Lady Grantham, are invited to Brancaster Castle to meet Bertie's formidable mother. Mrs Pelham is initially pleased until she complains about the late Peter Pelham, in which Bertie sternly shuts her down for. Later Edith came clean to Mrs Pelham about her past about Marigold being her illegitimate daughter. Although Mrs Pelham is initially against the possible marriage of her son to Edith, Bertie sticks up for Edith and claims he will marry her nonetheless and that he is not a child anymore and will make his own decisions. Then various guests are invited for dinner as Bertie was planning to announce his engagement to Edith and as Mrs Pelham was about to say something horrid, Robert quietly reminds her that she'll lose her son if she does so Mrs Pelham holds her tongue and instead wishes happiness for Bertie and Edith and toasts them, as everyone does. After the grand dinner was over, Mrs Pelham got won over by Edith and says that she was glad that Edith was upfront honest with her so therefore she agrees to the marriage and thinks it will be a success. Bertie and Edith share a kiss. Bertie and Edith got married at the St Michael's Church at Downton with everyone in attendance, including his mother as she wishes Edith to just love her son and be happy with him altogether. Bertie and Edith leave for their honeymoon and share another kiss in the car. Both are very happy.