By Dominic Culverwell in Berlin Moscow is accusing Kyiv of plotting to detonate a “dirty bomb” in a false-flag attack on its own territory, despite not providing any evidence to prove the claim. Russian Defence Minister Sergei Shoigu spoke with his counterparts in London, Paris and Ankara, warning of “uncontrolled escalation” from the Ukrainian side. In particular, he claimed that Ukraine was planning to detonate a “dirty bomb”, a mix of explosives with radioactive material, or a “small nuclear bomb”, to blame Russia and damage Moscow’s global standing. Kyiv and Ukraine’s Western allies have d…