This was completely weird! For a minute there, less than a minute even, I was logged in as Shaz.
I had been logged in last night on my iPad, and left it logged in, as I fell asleep. I never logged out of it, but obviously it should log you out after a period of inactivity. So having not used my iPad for about 20hrs, I came back on to the tab with the site running on it, and it sort of refreshed (as it does), and I was logged in as Shaz.
I didn't do anything untoward, as I said it was less than a minute, I couldn't if I wanted to; as soon as I clicked a link on the page I was logged out.
Probably just some weird bug glitchy thing? But I thought I'd mention, because I wouldn't think people would like having another person logged in their account, for any amount of time.