S

Just shows how hard I've been working whilst working from home. The 'S' key transfer* lifted almost completely off earlier, leaving only a tiny bit at the top left, so with careful scraping I got rid of the rest of it. Now it will annoying people who try and use my computer, so I'm quite happy about that.
And yes, it is a £5 keyboard from Asda which is probably why the lettering isn't resistant to hours of pressing the 'left strafe' key.

* I believe the ink transfer is called Silk Screening, but perhaps someone can correct me on this.