North and North West London:
n1, n2, n3, n4, n5, n6, n7, n8, n9, n10, n11, n12, n13, n14, n15, n16, n17, n18, n19, n20, n21, n22, nw1, nw2, nw3, nw4, nw5, nw6, nw7, nw8, nw9, nw10, nw11, nw12, nw13, nw14, nw15
Central London:
ec1, ec2, ec3, ec4, wc1, wc2
South and South West London:
sw1, sw2, sw3, sw4, sw5, sw6, sw7, sw8, sw9, sw10, sw11, sw12, sw13, sw14, sw15, sw16, sw17, sw18, sw19, sw20
West London:
w1, w2, w3, w4, w5, w6, w7, w8, w9, w10, w11, w12, w13, w14
