Early May is one of the best times of the year to visit the United Kingdom. The long grey winter has finally lifted, parks across London burst into bloom, the Scottish Highlands turn a vivid emerald, and — most importantly for your itinerary — the Early May Bank Holiday on Monday, 4 May 2026 creates a three-day weekend that transforms the whole country into festival mode.

If you're planning a UK trip for early May 2026, this guide walks you through the best of London and Edinburgh, what the bank holiday actually means for travelers, and the one detail about staying connected that catches almost every first-time visitor off guard: the UK is not covered by standard Europe eSIM plans.

Why Early May Is a Smart Time to Visit the UK

Late April and early May hit a sweet spot in the British calendar. Daytime temperatures in London sit comfortably between 12°C and 18°C — warm enough for long walks through Hyde Park without a heavy coat, cool enough that you won't wilt walking the Thames path. Daylight stretches well past 8 p.m., giving you long golden evenings for rooftop drinks in Shoreditch or sunset views from Primrose Hill.

Crowds are still noticeably lighter than the July–August peak. Queue times at the Tower of London, Westminster Abbey, and the Edinburgh Castle are typically 30–50% shorter than summer. Hotel rates are softer too — you can often find central London hotels 20% cheaper in early May than in peak summer, and Edinburgh is still months away from its August Fringe Festival surge.

Then there's the bank holiday itself. The Early May Bank Holiday (sometimes called May Day) is a proper public holiday, meaning most Londoners are off work, museums have extended hours, and the city has a genuinely festive atmosphere without the overwhelming tourist density of later months.

Book your accommodation by mid-April. The bank holiday weekend (May 2–4, 2026) is popular with domestic UK travelers too, and central London hotels fill up fast for those three nights.

London: What to Prioritize in 3–4 Days

Day 1 — The Classic Core

Start with the essentials you came for. Walk from Westminster Abbey past the Houses of Parliament and Big Ben, cross Westminster Bridge for the postcard shot, then follow the South Bank east past the London Eye and the Tate Modern toward Borough Market for lunch. In the afternoon, take the Tube to St Paul's Cathedral, walk across the Millennium Bridge, and finish at the Tower of London for the Crown Jewels before they close at 5:30 p.m.

Cap the evening with a show in the West End. Tickets are generally cheaper on weeknights, and TKTS Leicester Square offers same-day discounted seats if you're flexible about what you see.

Day 2 — Museums and Royal Parks

London's big national museums are free, which is a genuine travel luxury. Mornings are best at the British Museum (the Rosetta Stone gets crowded by 11 a.m.) or the Natural History Museum in South Kensington. Pair a museum with a walk through Hyde Park or Kensington Gardens — in early May the cherry blossoms are past peak but the tulips, bluebells, and wisteria are in full swing.

Afternoon tea is the cliché worth doing at least once. Fortnum & Mason is the traditional pick; The Wolseley is a more Londoner-approved alternative; and for a modern twist, Sketch in Mayfair is as much about the Instagram pink room as the scones.

Day 3 — Neighborhoods with Personality

This is the day to skip the tourist core. Start in Notting Hill with the Portobello Road Market (Saturdays are biggest), then take the Central Line east to Shoreditch for street art, vintage shops, and the Sunday UpMarket at the Old Truman Brewery. Camden Market is another strong pick for the afternoon — chaotic, photogenic, and packed with street food from every global cuisine you can name.

Day 4 — Day Trips

If you have a fourth day, the best day trips from London are Windsor (40 minutes by train, royal castle), Oxford or Cambridge (1 hour, postcard colleges), and Bath (90 minutes, Roman baths and Georgian crescents). All are easily doable as a day trip with a morning train out and an evening train back.

Edinburgh: The Perfect 2-Day Add-On

If you can spare two extra days, fly or take the LNER Azuma train up to Edinburgh. The train from London King's Cross takes about 4.5 hours and the window views through the Northumberland coast are spectacular. Flights are faster (75 minutes) but security and airport transfers eat the time advantage.

In Edinburgh, spend your first day on the Royal Mile, walking from Edinburgh Castle at the top down through the Old Town to the Palace of Holyroodhouse at the bottom. Detour up Arthur's Seat — it's a 45-minute climb to the top of an extinct volcano in the middle of the city, and on a clear May day the view across the Firth of Forth is unforgettable.

Day two, explore New Town (Georgian architecture, the Scottish National Gallery, and Dean Village just beyond), or take a day trip to the Highlands — Stirling Castle and Loch Lomond are both doable in a long day with a rental car or a guided tour.

The UK uses 3-pin Type G plugs, not the 2-pin Europlug used across most of the EU. If you're combining a UK trip with mainland Europe, bring both adapters or buy a universal one.

The Bank Holiday: What's Open, What's Closed

The Early May Bank Holiday falls on Monday, 4 May 2026. Here's what to expect:

Open as usual: Major museums (British Museum, National Gallery, V&A, Tate Modern, Natural History), the London Eye, Tower of London, Buckingham Palace (exterior — interior tours are summer only), most restaurants and cafes, all Tube and National Rail services (on a Sunday timetable).
Closed or reduced hours: Some small independent shops, a handful of museums in smaller cities, banks and post offices, some government-run attractions. Always check the official website the day before.
Bank holiday events: London often hosts outdoor food festivals, parades, and pop-up markets on the bank holiday weekend. Check Time Out London closer to the date for the 2026 lineup.

Getting Around: Tube, Buses, and Trains

Inside London, the Tube is fastest but the bus is scenic — you'll see more of the city from the top deck of a double-decker. Don't buy paper tickets. Instead, tap in and out with your contactless bank card or phone (Apple Pay / Google Pay works identically to an Oyster card, with the same daily price cap). This is by far the easiest option for visitors.

Between cities, National Rail is the way to go. Book tickets 6–8 weeks ahead on Trainline or directly through the operator for the cheapest fares. London-to-Edinburgh advance tickets can be under £50 each way if you book early; walk-up fares the same day can easily hit £180.

Staying Connected: Why the UK Needs Its Own eSIM Plan

Here's the detail that catches so many travelers by surprise: the United Kingdom is not part of the European Union's shared roaming zone anymore. Since Brexit, UK mobile networks are no longer bound by the EU "Roam Like Home" rules, and — crucially for travelers — most "Europe" eSIM plans you'll find online do not include UK data.

If you buy a 39-country Europe eSIM thinking it covers London, you'll land at Heathrow, activate it, and discover it doesn't work. This is one of the most common support tickets we see at eSIMzip, and it's completely avoidable.

Double-check the coverage list of any "Europe" eSIM plan before you buy. If the United Kingdom isn't explicitly listed among the covered countries, it's not covered — and you'll need a separate UK eSIM for your London and Edinburgh portion of the trip.

Your Options for UK Data

You have three reasonable choices for staying online in the UK:

A dedicated UK eSIM. The cleanest option. You get a UK local number (sometimes), a generous data allowance, and activation takes two minutes. If you're only visiting the UK, this is the obvious pick.
A multi-region eSIM that explicitly includes the UK. Some global or "Europe + UK" plans are sold specifically to bridge the post-Brexit coverage gap. Read the fine print carefully — look for "United Kingdom" in the coverage list, not just "Europe."
Activating two eSIMs on one phone. If you're doing a multi-country trip (say, UK + France + Italy), you can install both a UK eSIM and a Europe-39 eSIM on the same phone and switch between them as you cross borders. Modern iPhones and Android flagships support 8+ stored eSIM profiles.

For a 5-to-7-day UK trip with heavy Google Maps use, video calls home, and social media uploads, budget about 5–10 GB of data. If you're working remotely during the trip, 20 GB is more realistic.

Install and activate your UK eSIM before you board your flight. Activation needs a working internet connection (your home Wi-Fi is fine). Once installed, the profile sits dormant until you land, then connects to a UK carrier automatically the moment you switch your phone off airplane mode.

What About Free Wi-Fi?

The UK has excellent free Wi-Fi coverage in public spaces. Most London Underground stations now have Wi-Fi on the platforms (though not in the tunnels), and Network Rail offers free Wi-Fi at major London stations like King's Cross, Paddington, and Waterloo. Virtually every cafe, pub, and museum offers free customer Wi-Fi, usually with a quick email sign-in.

That said, free Wi-Fi won't cover you when you actually need data most — walking between Tube stations checking directions, uploading stories from a pub mid-afternoon, or hailing an Uber in the rain. An eSIM handles all of those gaps. Think of free Wi-Fi as a bonus, not a strategy.

Practical Tips for May 2026 UK Travel

Pack layers. UK weather in May is famously unpredictable. A waterproof jacket, a light sweater, and comfortable walking shoes will carry you through almost any forecast.
Carry a small amount of cash. Contactless cards work almost everywhere, but some small markets, older pubs, and black cab drivers still appreciate cash.
Download offline maps. Even with a good eSIM, offline Google Maps for London and Edinburgh is a safety net when you duck underground or into a stone-walled building.
Tip 10–12.5% at sit-down restaurants. Many add a "discretionary service charge" to the bill — check before adding extra.
Mind the gap — literally. And stand on the right side of Tube escalators so walkers can pass on the left.

Frequently Asked Questions

Final Thoughts

Early May is one of the most rewarding times to visit the United Kingdom — long days, mild weather, manageable crowds, and the bank holiday weekend wrapped into the trip. With a solid itinerary covering London's classic landmarks, a side trip to Edinburgh, and the right eSIM plan in your phone before you board, you'll spend less time troubleshooting and more time actually enjoying the UK.

Safe travels, and enjoy the tea.