Why choose marlin serviced apartments? Marlin is the leading operator of serviced apartments and aparthotels in London. We pride ourselves in offering our guests the perfect location no matter where in London you plan on visiting or where you need to be.What is the marlin collection? The Marlin Collection. Marlin is the leading operator of serviced apartments and aparthotels in London. We pride ourselves in offering our guests the perfect location no matter where in London you plan on visiting or where you need to be.Why choose blueblue marlin apartments? Blue Marlin Apartments has had a major refurbishment and has three beachfront apartments with unobstructed sea views. These apartments have bifold doors which open onto private patios with a personal barbacue on each patio. The apartments have a king bed, tiled onsuite, kitchens, air conditioners and 50inch wall hanging TV.