Originally Posted by g_leyser
Thanks for the detailed reply.
So, are you saying that I won't need a converter at all for my phone charger, for example? So for the purposes of my trip, all I would need is
this and
this then right?
Thanks for all the help guys, I am usually a pretty smart guy, but this stuff is just baffling to me

Yes, you don't need to buy a converter/transformer and you'll only need to have the standard UK plug for HK and Singapore outlets. Don't bother buying them since the concierge can loan you one.
To be sure that your chargers work on 110 and 220 volts, check the label. If it says "INPUT 100-240V" then you can plug it pretty much anywhere in the world without the use of a converter/transformer.