From a Classic Driver online article:

Titled Trinity: B.A.T. 5-7-9 and poised to take place at Phillips Berkeley Square on 20–23 November 2019, the exhibition will highlight B.A.T. 5, 7 and 9s’ visionary aesthetics in addition to their significance in the wider context of 20th-century art, architecture and design. 

Designed for Bertone by the supremely talented Franco Scaglione in the 1950s, the Alfa Romeo-based Berlinetta Aerodinamica Tecnica concept cars are seminal objects of 20th-century design. Widely known as the B.A.T. cars, the trio of audacious, ultra-aerodynamic and fully functional prototypes pushed the boundaries of automotive design like nothing that had come before and truly embodied avant-garde creativity.

To read more: https://www.classicdriver.com/en/article/cars/phillips-bringing-mythical-bertone-bat-concept-cars-london?utm_campaign=892019%20Aston%20Martin%20DB7%20Zagato%20EN&utm_content=892019%20Aston%20Martin%20DB7%20Zagato%20EN%20CID_a86e9a9f98d16c5ff80cce42a13cdc42&utm_medium=email&utm_source=newsletter&utm_term=Phillips%20is%20bringing%20the%20mythical%20Bertone%20BAT%20concept%20cars%20to%20London