In this example, with the legend, incurved letters, and bifoliate crown (that’s not one of the easily identifiable Ed II crowns), it’s a no-brainer for Class 10.
With Class 10, for me at least, I need to then sit down with a bit of paper and wade my way through the resources to determine and feel happy with the sub-class...it’s a pig to get right otherwise, for me at least.
The rest of the series is easy blinkin’ peasy! 😛