Hello, Elle!
I lived in Luton, briefly, then Dunstable.
I lived in Dunstable when the police were hunting for Harry Roberts.
Policemen everywhere. I remember it well!
Now, the calculators!
Firstly, I do not actually need one, for I have one on my Chromebook, my phone, and my tablet.
But I like having one separately.
I had two, that I use for doing sums.
But, last week my Canon one gave up the ghost, so I thought of a replacement.
(I'd had the Canon for a long time!)
I happened to mention it to Miss O and she let slip that she and her class are always short of calculators.
So, two of the three calculators are for her and her class, and one for me.
So, is the friendly plumber coming for his dinner, too, or have I got that wrong?
It is very thoughtful of you if you have invited him?