Hi,
Thanks for the warm welcome.
As far as I can tell the bird is about 1yr old. I'm only saying this due to the fact that we've only had her for approx 5 months & she didn't have her adult feathers when we got her.
After reading the responses everyone had provided, I left the egg in the cage.
Today she laid her 2nd egg.
I'll probably end up getting her a mate later on in the year, but for the monent I'll just leave her be.
Thankfully it's Autumn at the moment & the weather is cool with all this rain.