This heat/humidity is getting to me!
>
> I have been thinking about putting some form of Air conditioning
> just in the bedroom so at least I can have somewhere cool to
> sleep. It's not a big room, 4m x 3.1m but on the south facing
> corner of a bungalow.
>
> Any recommendations whether to go for a portable unit (they all
> seem to need a hose hanging out the window which seems to defeat
> the object) or a 'built in' solution with outside/inside units?
The hose is to dump the waste hot air. If you exhausted this into the room, well, that tends to defeat the purpose.
Ideally, you should make up a close-fitting frame to fit inside the window, with either polythene, or even acrylic or polystyrene sheet, with a hole for the hose to go down. This will significantly reduce air leaks.