Philippa is the co-founder of PLH Research and co-author of Inside Her Pretty Little Head and Brandsplaining. Here, she talks about "larky" school days; fulfilling the scripted role of "the good girl"; the lack of understanding of female audiences in advertising; work for the Conservative Party and Tesco; the magic of partnership and "the power of pairs"; celebrating "quiet virtues"; and taking on "difficult projects for nice people".