1 bed flat

Here's a rewritten summary that adds a bit of flair while still being factual:

"Step into this charming one-bedroom duplex apartment in Marylebone, where period charm meets modern convenience. With a south-facing aspect and approximately 540 sq ft of living space, this delightful home boasts an open-plan kitchen and reception room, perfect for entertaining or relaxing. The comfortable double bedroom is a serene retreat, and the property's long lease of 167 years offers peace of mind for investors or first-time buyers. Situated in the heart of Marylebone, you'll be surrounded by trendy boutiques, restaurants, and cafes, as well as excellent transport links. Whether you're looking for a lifestyle upgrade, a savvy investment opportunity, or a rare chance to own a piece of London's history, this apartment is a must-see."