As described by YouTube uploader Stevothemadman1:
We were filming a short sketch for my Instagram page, using plastic toy guns as props. A member of public must of saw us and called the police. Rightly so. Especially with all the stuff going on over in the states. We should have been more responsible. Definitely pooped myself a bit tho haha! Let this a lesson to everyone, don’t play with plastic guns in public. It was worth the 8 hrs we spent in the cells.
Watch as their filming is interrupted by a super vigilant police unit:
Just a big misunderstanding then, though you have to believe these guys were moments away from becoming the UK version of Michael Brown.