Ukraine invasion: As the fight moves into its fifth day - why are Putin's forces making such slow progress?

The initial handling has been quite surprising and at a tactical level we thought the Russians were better than this,” said Sam Cranny-Evans, a Russia military expert at the Rusi think tank. “We were expecting it to be a lot more co-ordinated than it has been, especially in combined arms operations. This is probably down to a combination of five or six things going badly wrong.”