Only that you must check regularly. Bans can be lifted overnight if it rains, or imposed suddenly if the sun gets too cheeky. Think of the map as your water horoscope: check it every day, or risk a bad fate.
Also, some maps are region-specific. If you live in a weirdly rural area with three cows and a postbox, you might need to hunt for the right one. But most are linked from your water company’s website.
Hosepipe ban comes into force in Kent and Sussex - BBC News
The tools you can still use (because hope springs eternal)
Even with a ban, you can still use: a watering can (old-school cool), a bucket (glamorous, I know), and—get this—a hose with a trigger nozzle that shuts off automatically. Yes, those are allowed. It’s like cheating the system, but 100% legal.
And a rain barrel? That’s basically free water. Mother Nature’s special delivery, no postcode required.