GPE confirms Facebook W1 let Mike Cobb11/09/2015 | Offices | EnglandPrintDownload Great Portland Estates has confirmed the let of One Rathbone Square, W1 to Facebook. The social media giant will take all the 227,324 sq ft of space in the development Thank you for reading EG Want to read more? Enjoy a story a week for FREE. Register Find Out More Already a subscriber or registered user? Sign in