20kg Post mix just put down hole and add water and compact, will be solid in 10 mins, We recommend at least 2 bags per hole and 3 bags for a corner post, we deliver to

DA1 Crayford, DA1 Dartford ,DA3 Longfield, DA5 Bexley, DA6, DA7 Bexleyheath, DA8, DA18 Erith, DA9 Greenhithe Swanscombe, DA10 Swanscombe, DA11, DA12, DA13, DA14 Gravesend, DA14, DA15 Sidcup, DA16 Welling, DA17 Belvedere, BR1 Bromley, BR2 Bromley, BR5 St Mary Cray, BR6 Orpington, BR7 Chislehurst, BR8 Swanley, SE2 Abbey Wood, SE3 Blackheath, SE7 Charlton, SE9 Eltham, SE10 Greenwich, SE18 Woolwich, Maidstone ME15