detail of the top of the legendary curved skyscraper 20 fenchurch street or walkie talkie and a london police helicopter flying

fenchurch street abstract architecture avantgarde building exterior business city london future concave corporate crystal glassware design downtown district engineering facade financial futuristic geometric shape glass glazier growth high iconic innovation looking low angle view majestic modern office oppressive pattern place work reflection rise skyscraper steel lamp tall urban walkie talkie window detail top legendary curved police helicopter flying clear blue sky