The UK Ministry of Defense has said in its latest intelligence update, The Guardian reports.

The two primary road bridges giving access to the pocket of Russian-occupied territory on the west bank of the Dnipro in Ukraine’s Kherson region are now probably out of use for the purposes of substantial military resupply, British military intelligence said on Saturday.
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Even if Russia managed to make significant repairs to the bridges, they would remain a key vulnerability, The Guardian reported the UK’s Ministry of Defense as saying.

The intelligence update said also the next:
Ground resupply for the several thousand Russian troops on the west bank is almost certainly reliant on just two pontoon ferry crossing points.
With their supply chain constrained, the size of any stockpiles Russia has managed to establish on the west bank is likely to be a key factor in the force’s endurance, according to the update.

As Defense Express reported Another Strike on a Dam in Southern Ukraine Completely Disabled russian Supplies in the Area. We also explained why did Ukrainian port city Kherson matter.
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