A white nationalist group held a protest in London’s Old South neighbourhood as part of a “training” exercise over the weekend.
The woman used a hammer to break electronic locks on the front door of the RBC Place London, police say.
A huge police presence shut down streets in downtown London as tensions flared during a protest against a defence-sector event.
A video showing a group of masked men chanting far-right slogans outside London city hall is drawing international attention and is now under investigation by London police.