If your idea of a good October involves jump scares, fog machines and things lunging at you from the dark, there's a big new reason to block out an evening in London. Nightmare Realm, a large-scale immersive horror experience styled as a scream park, is staging its event in the capital — and it's pitched at a serious scale, with multiple themed horror zones and scare actors roaming the site rather than a single haunted house you walk through once.

The scream park format will be familiar to anyone who's been to Halloween events in the US, but it's still relatively rare in the UK at this size. Instead of queuing for one attraction, visitors move between several distinct scare mazes and outdoor areas, each with its own theme, storyline and style of scare. Actors work the crowds between attractions too, so there's no safe wandering zone — if you're on site, you're in the story.

For visitors, the appeal is twofold. First, it's a genuinely social night out: people come in groups, compare notes on which zone scared them most, and plenty dress up themselves. Second, it's an easy add-on to a London trip in late October. Unlike a countryside scream park that requires a car, this one sits within reach of central London transport links, so you can spend the day sightseeing and still fit in a couple of hours of organised terror after dark.

A few practical things worth knowing before you book. Scream parks run timed entry slots in the evening, and the most popular Halloween-weekend dates tend to sell out well in advance, so booking early is the difference between going and staring longingly at the fog from outside. It's an outdoor event in Britain in autumn — warm layers and shoes you don't mind ruining are non-negotiable. And check the age guidance before bringing teenagers: this is designed to be intense, and most scare attractions of this kind set minimum ages or recommend adult accompaniment for younger teens.

If full-body fright isn't your thing, there are usually calmer options on site — street food stalls, bars and fire performances are standard fare at these events, so a nervous friend can still come along and hold the coats. But make no mistake: the mazes are the reason people queue.

Who's it for? Halloween enthusiasts, horror fans, and travellers who want something memorable and a bit different from the usual London evening out. If you'll be in the city around Halloween, it's one of the more distinctive seasonal events on the calendar — and it makes a solid argument that the capital can do spooky season just as well as anyone.