United Kingdom eSIM

The UK is largely cashless — tap your card or phone almost everywhere, including the Tube and buses (daily Tube fares are capped automatically). ATMs ('cashpoints') give better rates than airport exchange kiosks; carry a little cash only for markets and small rural spots.

The UK uses the 3-pin Type G plug at 230V. Bring a UK adapter — many hotels don't provide one.

Traffic drives on the left, so look right first when crossing the street — many crossings even paint 'Look Right' on the road.

Tipping isn't mandatory like in the US. In restaurants, 10-12.5% is appreciated — but check the bill first, as many already add a 'service charge' (so you don't tip twice). No tip is needed when ordering at a pub bar.

Use Citymapper or Google Maps for the Tube, buses and trains — they're the easiest way to navigate. Download offline maps for tunnels and areas with no signal.

Many of London's top museums have free entry — the British Museum, Natural History Museum, Tate Modern and National Gallery — perfect for a rainy day.

UK weather changes fast, even in summer — pack layers and a compact umbrella, as sun and rain can swap within an hour.