welcome back our special coronation coverage on "cnn newsroom" live from outside buckingham palace. i'm isa soares. right now, thousands of british troops are getting ready for the start of king charles' coronation. many have just arrived, in fact, in the last few minutes. london's waterloo rail station, where their march is set to begin. our anna stewart is there and joining me now. this is going to be a pretty spectacular show of force. walk us through what you are seeing and what we can expect. >> reporter: yeah, we just saw the first train come in with hundreds of soldiers. these were from household division, the foot guards, the grenadiers, the scots, the welsh guards as well. this is going to be a massive day. the biggest military ceremonial operation we've seen in this country for 70 years. essentially since the last coronation of queen elizabeth