Salaries in Singapore vs London

Anyone have rough estimates of salary benchmarking for Singapore to London? I’m just trying to get a rough sense of what pay looks like for a senior communications manager in each market. OR even just “generally salaries are equal or one market pays more than the other”.

I know salaries in NYC are much higher than in London, at least for PR/comms. But having lived in both places I have context as to COL. I don’t have that for Singapore vs London.