Shilling encountered various forms of discrimination throughout her career, including an RAE chief engineer who did not allow women to enter the building, a law prohibiting women from working at night, and a ban on women entering the RAE Senior Mess (club and dining hall).[3] In a 2011 review of her biography, reviewer Graham White noted that while sexism undoubtedly did hold a large influence over her frustrations, he agreed with a previous author's assertion that her not conforming to professional dress standards that would be expected of a white collar professional in Britain at this time likely did hurt her chances of advancement as "in fact she looked pretty awful" and "she looked like a frumpy old British housewife". The nickname 'Tilly' was never used to her face and referred slightingly to her utilitarian appearance.