London, Jan 9: Outgoing British High Commissioner to India David Gore-Booth has accused foreign secretary Robin Cook of seeking to build `personal image' instead of policy, `destroying morale' at the foreign office and losing trust of senior diplomats.The morale at the foreign office was sinking with the result that civil servants might soon feel obliged to defend themselves in public, if Cook does not reassert the right of `ministerial responsibility', Gore-Booth said in a valedictory telegram before stepping down from office.``The devastating assault'', as the media put it, amounted to a sweeping censure of the new Foreign Secretary's 20-month tenure.