11 company 11 April 1917 - map
Based on maps in Bullecourt (1999) Graham Keech p.47, p.51 and p.56.
586 is positioned further west on p.51 of "Bullecourt", the above position is that given for a tank on the PRO trench map for May 1918.
593 may have been at position C4b.5.8 see "aftermath" section for details.