Everything British Worth Streaming in September 2025

Ahhh, September. The windows are finally open, the breeze is cooling down, school's back in session, and summer holidays are a memory. Most importantly, television is ready for families to get back to their usual work schedules and, more to the point, their tired evenings on the couch. September has been the beginning of the television season since the phrase "Television Season" was invented, and 75 years later (give or take) that tradition still holds.

Even streaming services, especially the ones tied to broadcast networks, tend to debut their biggest hopefuls for new hit shows in the September-October time frame, and the majority of weekly series make their returns. But this year, no streamer is going quite as hard as BritBox, which is literally creating an old-school style "week of debuts" in early September, premiering three Season 1s of brand new series back to back, all three of which are clearly meant to become hits.

The large number of debuts also means every major streaming service has an entry on this list, so buckle in and make sure your logins are working, because there's quite a bit of good British (or British-ish) stuff on the way this month. So let's run down everything British streaming around the apps for September 2025.