Is there any Russian money going to UK/London anymore? Or any that wasn't frozen/sanctioned that hasn't already left.

I know of trader who left London to work in Dubai to still take his Russian clients business, and apparently all Russian money is going there instead of London.

No Russian money, no sirree. Fortunately there's still plenty of housing designed to appeal to Russian-speaking investors holding passports from Vanuatu, Cyprus or St Kitts and Nevis and fat investment trusts in the Cayman Islands.