The literature indicates that disabled workers in the UK experience more social injustice than UK workers as a whole, including in relation to employment rates and wage levels. Drawing on the author's 2015 qualitative study of 265 disabled workers, this paper considers how successful the Equality Act 2010 Reasonable Adjustments Duty has been in tackling this social injustice. It finds that in the context of the "flexible" labour force (consisting of insecure jobs), and the "reformed" welfare state, the Reasonable Adjustments Duty is ill-equipped to achieve its original purpose of reducing the substantial disadvantage that disabled workers face. As regards the "flexible" labour force, there appeared, for example, to be a strong reluctance to make reasonable adjustments for workers on zero hours contracts; while, as regards the impact of welfare reform, fear of being dismissed and facing benefit sanctions discouraged zero hours workers from pushing for adjustments which had been refused. The paper goes on to suggest a possible wording for a strengthened Reasonable Adjustments Duty. It concludes, however, that, without changes to unfair dismissal, and other labour laws, to address the wider iniquities of the flexible labour market, a strengthened duty will not be able to prevent a long term increase in social injustice for disabled workers.