A total of 29 arrests were made in 24 hours. The raids were the latest phase of a police crackdown on the so-called GAS gang - which is based in Lambeth - that has seen a total of 88 arrests.
It's a London-based gang but they're extending their drugs network and finding new markets to ensure they get more money.
They've got their tentacles into Home Counties and further afield because they want to expand the amount of profit they can get.
The reason we target them is that we still get the associated violence in London when they return.
More top news
Acting Commissioner Craig Mackey led new policemen and women in paying their respects at a passing-out parade in Hendon, north-west London.
The tour of European capitals was timed to coincide with the start of the Article 50 process to exit the EU.
The Football League will introduce the project if the family of PC Keith Palmer supports the idea.