“I shouted ‘he’s here’ ... I then heard a gunshot very close to my ear”

“ABOUT 10.03am I saw the male in the denim jacket enter Stockwell tube station. I transmitted via my radio a request for directions as to whether (he) should be detained.

I received a reply from H5 instructing me to wait and I therefore continued with conventional covert surveillance. (I saw) the male in the denim jacket enter the foyer of Stockwell tube station and take a free copy of the Metro newspaper from a stand on the right-hand side of the foyer. He then walked towards the barriers, produced a ticket and passed through the barrier. He turned left and descended an escalator towards platforms 1 and 2, northbound. About halfway down he started to run and as he left the escalator at the bottom he turned left at the first archway/entrance to platform 2, northern line northbound.

As he did he ran towards a train, entered the carriage before turning right and walking through the carriage before taking a seat on the nearside of the carriage facing the platform opposite the next set of double doors on the carriage. He was sat down with a glass panel to his right about two seats in.