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Russian forces have combined airstrikes and massed artillery fires to bring its overwhelming" firepower to bear in Donbas, the UK Ministry of Defence has said in its latest intelligence report released this morning.

This combined use of air and artillery strikes has been a key factor in Russia's recent tactical successes in the region, the report reads.

Russian air activity remains high over contested ground in the Donbas with Russian aircraft conducting strikes using both guided and unguided munitions.

These strikes alone however have failed to have a meaningful impact on the conflict and Russian stocks of precision guided missiles are likely to have been significantly depleted as a result.

The combined use of air and artillery strikes has been a key factor in Russia's recent tactical successes in the region. The increased use of unguided munitions has led to the widespread destruction of built-up areas in the Donbas and has almost certainly caused substantial collateral damage and civilian casualties.