For example, Professor Lorraine Johnstone of St Mary's Kenmure described 18 years of age as "rather an arbitrary cut off"vScottish Parliament, Criminal Justice Committee, Official Report, 29 March 2023, col 19. whilst Linda Allan said that the Bill, whilst welcome, did "not go far enough" and was "quite confusing in terms of the new sentencing guidelines that were published in 2022 and the robust research into neural development".