girlonthenet, I got to about 45% without breaking a sweat, thought a bit harder about 45-50, and am now absolutely RINSING myself for the fact that I still have a blank or two on the fucking circle line. THE CIRCLE LINE. Ugh.
https://london.metro-memory.com/ Anyway thanks @melofthevalley and @Mollysdailykiss for giving me what I now view as my most important life task.