If you choose to holiday at a 4-star hotel in London, you'll usually find loads of amenities to keep you relaxed, such as a pool, gym and restaurant. You can experience high-quality service and upscale accommodation. Pick a 5-star hotel and you'll have access to a few extra bells and whistles — think around-the-clock concierge, on-site spas and indulgent turndown services. You'll most likely get additional amenities and premium services at a 5-star getaway, though both are superb options for luxury guests.