You've only added one named driver (male), add another, preferably female. Females make the most difference, though I find both sexes make some. Some people find males increase it. My quote earlier was fictional parents, one of each sex with a 15 year held clean license.
Corsa will have 5 seats, not 4, no idea if that would throw up any kind of oddity on their quoting system.
Try direct with Elephant or LV too, they'll ask for your previous best quote (I entered £1500 in the one I did earlier) and so they have a benchmark to compete with.
Beyond that, I don't know, perhaps your name is Mohammed Bin Bombing or something, as other than your actual name and email, nothing myself or Lopez are quoting with is fundamentally different as far as I can see.