Police chief ‘sorry’ over death”

BBC NEWS | UK | Police chief ‘sorry’ over death
My personal view :
I’m sorry this guy died but after last weeks bombs you don’t do anything to cause suspition, the guy vaults (either jumps or smashes through) the automatic ticket barriers and heads for the platforms,
he then ran down an escalator after being approached by up to 20 plain-clothed police officers and tried to board a train, he apparently refuses to obey police instructions and after running onto a northbound Northern line train,
If all the above is true, what else could the police do?