The GOSLON/5-year-old scoring systems have been used in various national and international studies. This study aims to identify the range of Modified Huddart and Bodenham (MHB) scores, which correlate with each GOSLON and 5-year-old category and thereby create a new scoring system that allows comparison with historical data. Two hundred and eighty-three unilateral cleft lip and palate study models from England and Scotland that had all been previously scored using the 5-year-old and GOSLON indices by calibrated examiners were scored using MHB on two separate occasions a month apart by two examiners. Reliability analysis using intraclass correlation and Bland Altman plots were performed. Ordinal regression was used to define the categories of MHB that correspond to the 5-year-old and GOSLON categories. The results revealed a high level of repeatability for both the 5 and the 10 year old models. The MHB scale was grouped into the five categories of the GOSLON and 5-year-old indices with more precision for the 5 year than the 10 year scores. In conclusion, there was high intra-examiner and inter-examiner agreement using the MHB scoring system. It also correlates well with the 5-year-old and GOSLON indices and has been shown to be a much more sensitive scoring system.