Adult δ13Ccoll and δ15Ncoll mean values and standard deviations for the post-medieval sites of Chelsea (n=28), Lukin Street, London (n=64), Christ Church Spitalfields, London (n=88), All Saints, York (n=10), Coventry (n=11), St Martin’s, Birmingham (n=18) and Kilkenny Workhouse, Ireland (n=14) (Trickett 2006, Beaumont et al. 2013a, Nitsch et al. 2010; Müldner and Richards 2007a; Richards 2006) QCS is marked in red and SB in blue. Adults are defined as individuals being 18 years of age or above