Russia seems to be reacting to Ukraine's new tank contingent with so-called "dragon's teeth" These are pointed stone blocks, which are supposed to stop the enemy tracked vehicles in front of the line of defense. Moscow is probably relying on deep trenches at the front to slow down tanks.
A video is currently circulating of a Challenger 2 tank simply pushing away Russian " dragon's teeth". It is equipped with a shovel so that it can easily push aside any objects in its path. Britain has been vehemently supportive of Ukraine from the beginning of the Ukraine war.