John Doyle, Jubilee line general manager for London Underground: said:
“The unions have informed us that they are in dispute with us over what they perceive as a breakdown in industrial relations. We are keen to understand their concerns and so will be meeting with the unions later this week to discuss these issues in greater detail.”
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The 52-year-old had previous convictions for violence but was not on the anti-terror watchlist.
In a statement Charlton Athletic said: Keith was a true hero who will be greatly missed by all the Charlton family and everyone at the club.
London and the worlds has united on Twitter in defiance of the West minster attack #prayforlondon #wearenotafraid