Is the London Pass worth it?

Only if you plan to visit at least 3 major paid attractions per day. If you prefer walking and free museums, buy tickets individually.

Do I need to carry cash?

Almost never. London is effectively cashless. A credit card with 'tap to pay' is sufficient for everything from markets to public toilets.

How to Spend a Long Weekend in London

Spend 3 days in London by grouping attractions by neighborhood to minimize transit time. Use the Underground (Tube) to get around and prioritize booking museum tickets and dinner reservations at least 4 weeks in advance.

Purchase an Oyster card or use contactless. Don't buy paper tickets. Tap your contactless credit card or phone (Apple/Google Pay) at the yellow readers on all Tube and bus barriers. The system automatically caps your daily fare.
Book timed entries. Popular spots like the Sky Garden, The View from The Shard, or major museum exhibitions fill up weeks ahead. Book your time slots online before you leave home.
Map your walking routes. London is a series of villages. Stay in one borough per day (e.g., Westminster on Day 1, The City on Day 2) to avoid spending your weekend sitting on the Underground.

Is the London Pass worth it?: Only if you plan to visit at least 3 major paid attractions per day. If you prefer walking and free museums, buy tickets individually.
Do I need to carry cash?: Almost never. London is effectively cashless. A credit card with 'tap to pay' is sufficient for everything from markets to public toilets.