Here's my work:
There's an extra point in my legend, not sure where that comes from:
The spatial functions are really incredible!
I love spatial tools... and mostly despise building Report Maps. BUT, I'm always so pleased with myself when the OCD finally achieves victory
The final map - I chose to highlight those that ended up North of the Thames, and then grey out those that fell below the river. Took some maneuvering with the map layers, but it's a lovely looking pub crawl by the time I finished