Ukraine has increased frontline artillery strikes in the south of the country, with Russia reorganising troops in the region following their poor performance in the early stages of Moscow's invasion of Ukraine.
In a series of tweets, the Ministry of Defence (MOD) said while it was not possible to confirm Ukrainian advances, their "long-range precision strikes continue to disrupt Russian resupply".
The MOD also said Russia has looked to "rationalise the several, semi-independent, operational commands which contributed to its poor performance early in the invasion".
This has included efforts to reinforce its force on the western bank of the Dnipro River, near Kherson.
The MOD added it was "highly likely" the Southern Military District's (SMD) 49th Combined Arms Army has been expanded with parts of the Eastern Military District's (EMD) 35th Combined Arms Army.
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"Most of the units around Kherson are likely under-manned and are reliant upon fragile supply lines by ferry and pontoon bridges across the Dnipro," the MOD tweeted.
"This integration of SMD and EMD units suggests a significant reorganisation of Russia's force in Ukraine."
However, the MOD added if Ukraine succeeds in its offensive operation, "the cohesion" of the newly organised Russian military structure will be key to the "sustainability of Russian defences in the south".
It comes as the Ukrainian military started its long-awaited counter-offensive against Russian forces in the country's south, according to its southern command.
Ukraine's Southern command spokesperson, Natalia Humeniuk confirmed the offensive in a news briefing on 29 August – also stating the offensive included the Kherson region.