Some info on the 3 Britons on the plane - all look of Iranian descent.
1 British Petoleum (BP) reservoir engineer
1 Laing O'rourke engineer who had done research PHD at Imperial College
https://metro.co.uk/2020/01/08/first-pictures-british-victims-among-176-killed-iran-plane-crash-12023857/
A quick look at Laing O'Rourke shows they built Citigroup's Canary Wharf building.