Taylor Swift's ready to have tea and crumpets with her man Travis Kelce after her show tonight ... 'cause he's out in London to support her -- and, it looks like it's a double date.
The singer-songwriter took the stage in England's capital at Wembley Stadium ... and, TK's front and center, dapping up his friends and signing autographs for fans in the crowd -- a real joyous scene.
BTW ... Travis is definitely bringing a taste of America across the bond -- 'cause he's got a U.