Los Angeles ? Last year, Alyson Hannigan and Alexis Denisof traveled the world.

“Last summer, we took, like, 17 flights or something,” says Denisof. “We went to Papua New Guinea and Fiji, London and New York, you name it. This year, we kept it kind of simple.”

The two actors met on the set of “Buffy the Vampire Slayer,” but didn’t start dating until Denisof’s character, pompous British “Watcher” Wesley Wyndham-Price, moved to spin-off series “Angel,” while Hannigan stayed as Willow Rosenberg on “Buffy.”

Denisof, an American, spent several years working and living in Britain, but this past summer, Hannigan had as much reason to visit there as he did.

After losing her lover, Tara (Amber Benson), to a stray gunshot, Willow turned to dark magic. Under its influence, she killed Tara’s attacker, Warren (Adam Busch), and nearly destroyed the world.

After the intervention of Buffy’s (Sarah Michelle Gellar) Watcher, Giles (Anthony Stewart Head), who teleported back from England to help, and childhood friend Xander (Nicholas Brendon), Willow was still in need of some intensive therapy.

Apparently, this entails a trip to Giles’ hometown of Bath, a Roman-founded city in southwestern England.

“She already finished that,” says Denisof. “It rained buckets. They probably could have been on a green backdrop in Ventura County for the amount of England we got to see no, that’s not true. They got lots of great shots of Bath and the surrounding areas.”

This marks the first time “Buffy” filmed in the U.K., where series creator Joss Whedon spent his high-school years, and where the show is extremely popular.

Asked if a road trip for the darker-themed “Angel” might be in the offing, Denisof says, “I shudder at the thought of where they would send people from ‘Angel.’ It would be like the wrong side of Detroit or something.”