London rewards time, but you can hit the highlights in **3–5 days** if focused. Here's a pragmatic breakdown by zone and interest.
| Zone / Theme | Key Sites | Days Needed | Best Flow |
|---|---|---|---|
| Core Westminster / City (Icons) | Buckingham Palace, Westminster Abbey, Parliament/Big Ben, Trafalgar Sq, National Gallery, St Paul's, Tower of London, Tower Bridge | **2 full days** | Day 1: Westminster walk → Abbey → Parliament → Thames → Tate Modern → Globe → Borough Market. Day 2: Tower → Bridge → City walk (St Paul's, Guildhall, Leadenhall) → Monument → Sky Garden. |
| South Bank & Bankside | London Eye, Southbank Centre, BFI, Tate Modern, Globe, Borough Market, HMS Belfast | **½–1 day** | Combine with Westminster Day 1 afternoon or separate morning. |
| Kensington / Museums Quarter | V&A, Natural History, Science Museum, Royal Albert Hall, Hyde Park/Kensington Gardens, Harrods | **1–1.5 days** | Pick **two museums max per day**; they're enormous. Walk park between. |
| Greenwich | Royal Observatory (Prime Meridian), Cutty Sark, National Maritime Museum, Queen's House, Greenwich Market, Park views | **½–1 day** | River boat (Uber Boat/Thames Clippers) from Westminster → Greenwich = scenic transit. |
| Character Neighbourhoods (Pick 1–2) | Covent Garden (shopping/theatre), Camden (market/canals), Notting Hill (Portobello Sat), Shoreditch (street art/nightlife), Hampstead Heath (views/ponds) | **½ day each** | Evenings or half-days between majors. |
**Bottom line:** 3 days = highlights photo reel. 5 days = feel the city. 7 days = live it.