GERMAN cops who slapped a strong beer ban on Three Lions fans say they should smoke cannabis instead.

Fears of booze-fuelled trouble at Sunday’s game against Serbia saw stadium chiefs told to serve only weak beer or shandy.

But cannabis was legalised in Germany on April 1, and a Gelsenkirchen Police spokesman told The Sun yesterday that fans getting “Harry Kaned” on pot will be allowed to puff in peace.

Stephan Knipp said: “It’s no problem for fans to smoke cannabis on the street.

“If we see a group of people drinking alcohol and looking a bit aggressive, and another group smoking cannabis, of course we’ll look at the group drinking alcohol.

“Drinking alcohol can make someone more aggressive, and smoking cannabis puts people in a chill mood.

“We want to prevent violence and keep people safe.

“Our focus will be on fans who are drinking and potentially getting violent — that’s why we in place safety precautions on alcohol.”

While fans will be able to smoke dope in many public areas, it will not be allowed inside the 62,000-seat Veltins Arena, nor in fan zones, bars or city squares.

And bars in “sensitive areas” of the city will stop serving booze immediately before and after the game.

Fears of violence rose over intelligence reports suggesting 500 Putin-supporting Serbian ultras would turn up.