Met != CoLP.
The Met is just your basic police force, for the capital. They are mostly concerned with 'the usual' - burgleries, muggings, car theft, the occasional murder. The expected.
CoLP are a police force for The City, that tiny bit in the middle of London that runs a good chunk of the global economy. They don't do street crime much. Their main focus is on financial and business crime - fraud of various types, insider trading, the crimes that happen when you cram lots of financial businesses together. They are sometimes criticised for having a rather too-close relationship with business (which supplies much of their funding), which goes some way to explain the substantial resources they devote to enforcing copyright law and seizing counterfeit goods. CoLP management considers copyright infringement and the manufacture/import of counterfeit goods to be economic crimes, and thus an area that the CoLP should be focusing on.
You still might see a CoLP officer on the streets if you're in the City, but never outside. You can tell them from the Met by their hats: Met have the famous blue chequer pattern. CoLP have the same pattern, but in red.