The wind is 180/10 and the its runway 30L. So the wind is 120 degrees off giving 5kts tail. Suggest you use fig 4.1 in section 4 CAP698 to find HW or TW component.
Move through the graph ,fig 3.2, entering with the wind of 5kts tail, no need to factor as the graph lines for HW/TW achieve that. Output from the graph is 4600ft reduced by 7% for heavy duty brakes giving 4278ft.

The % reduction depends on whether its a flap zero T/O or a flap 25 T/O.
At flap zero (fig 3.2) the reduction is only 7% because of the higher rejected T/O speed but at flap 25 (fig 3.4) the reduction is 13% because of the lower rejected T/O speed (same conditions for both).