Groups of far-left envi­ron­men­tal activists block­ad­ed two British print­ing press­es on Sat­ur­day, pre­vent­ing a num­ber of news­pa­pers being deliv­ered — a move that drew crit­i­cism from across the polit­i­cal spec­trum and was con­demned by Prime Min­is­ter Boris John­son as “com­plete­ly unacceptable.”