Three days still barely scratches the United Kingdom, four nations (England, Scotland, Wales, and Northern Ireland) built around one capital, London, not to be confused with the Republic of Ireland next door, a separate country on the euro. This route skips the icons entirely: two days inside the London most visitors never see, then a train out to the Kent coast on day three for a change of scenery that doesn’t mean leaving the country.

Two days is nowhere near enough for the United Kingdom, a country of four nations, England, Scotland, Wales, and Northern Ireland, not to be confused with the Republic of Ireland next door, a separate country that uses the euro. This route doesn’t try to cover the UK; it stays entirely inside London, the capital, and swaps Buckingham Palace and the Changing of the Guard for the London that residents actually use: a canalside market in Hackney, a free museum built from one obsessive architect’s private collection, and a legal graffiti tunnel under Waterloo.

Seven days is enough for three real stops without turning half the trip into a train seat: two days in the London most visitors skip, two in Edinburgh’s quieter corners, and three pushing further, into the Highlands, by rail, ending on an overnight sleeper rather than a rushed flight home. The United Kingdom is four nations, England, Scotland, Wales, and Northern Ireland, with London as the whole country’s capital, not Edinburgh’s, which belongs to Scotland alone.

Four days, split evenly: two inside London away from the icons, then two in Edinburgh’s quieter corners, linked by a roughly four-hour train instead of a flight. The United Kingdom is four nations, England, Scotland, Wales, and Northern Ireland, with London as the UK’s capital, not just England’s, and Edinburgh is Scotland’s capital, not England’s. Everything here is priced in pounds sterling, never euros, and prices already include 20% VAT. Apply for the ETA before you fly, roughly £20 as of 2026, and pack a rain layer regardless of the forecast; contactless covers almost everything, and both cities are genuinely safe to walk after dark.

Five days splits toward Edinburgh: two days inside London away from the icons, then three in Edinburgh’s quieter corners, linked by a roughly four-hour train rather than a flight. The United Kingdom is four nations, England, Scotland, Wales, and Northern Ireland, with London as the UK’s capital, not just England’s, and Edinburgh as Scotland’s capital, not England’s; the Republic of Ireland next door is a separate country on the euro, not part of the UK.

Six days is enough to string together three stops without rushing any of them: two days inside the London most visitors skip, two in Edinburgh’s quieter corners, and two more breaking the journey south in York, all linked by train rather than a rental car or a short-haul flight. The United Kingdom is four nations, England, Scotland, Wales, and Northern Ireland, with London as the whole country’s capital and Edinburgh as Scotland’s, not England’s.