I know everyone was eagerly awaiting the update to what the mysterious plant was that I was curious about previously.
Well, within moments our family was able to figure it out. Tim’s mum and aunt very quickly pointed out that it is a croton. A collegue of mine was able to figure it out the next day by Googling “plant with green and red leaves”, but sometimes the most obvious key words don’t come to you.

Armed with this information, I’ve moved the plant to the window sill which gets light all day. I’ve also started only watering it when the top soil is dry, and then watering it thouroughly (allowing the excess water to drain, not sit).
I’ll also have to look into buying a spray water dispenser, as it apparently likes humidity. Maybe being sprayed with water will trick it into thinking it’s humid.