Rivers of London - How Close to Core BRP?

[kronovan]

I've noticed that the Going Underground adventure for Rivers of London is on sale at drivethru today at a huge 80% discount. I own the hardcovers for CoC 7, BRP UGE and the PDFs for Delta Green, but haven't gone there yet with RoL.
So...I'm wondering if RoL is close enough to core BRP, for me to make sense of a RoL adventure without owning the core book?