Even if Russia manages to make significant repairs to the bridges, they will remain a key vulnerability, the UK's Ministry of Defence said.
"Ground resupply for the several thousand Russian troops on the west bank is almost certainly reliant on just two pontoon ferry crossing points," the ministry said in an intelligence update.
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.
(Reporting by Rhea Binoy in Bengaluru; Editing by Kirsten Donovan)
