This fascinating site was described in this week’s Brent and Kilburn Times. The total number of bombs dropped from 7th October 1940 to 6th June 1941 in Willesden Green was 40 (High Explosive Bombs). These roads had at least one hit:Pound Lane, Deacon Road, Villiers Rd, St Paul's Avenue, High Rd and Chapter Rd. Roundwood Park appears to have had most of the bombs.
Bomb Sight WW2 bombs census can be found at: http://bombsight.org/#10/51.4399/-0.1064
and the Willesden page at: