Themes Molecular self-assembly in nucleation This session will focus on the transition pathway, and its associated molecular assembly process, for solute molecules as they aggregate and stabilise into clusters prior to their subsequent development in the growth stage into facetted crystals. The session will seek to examine the latest results from both experimental studies and advanced molecular and synthonic modelling. Nucleation kinetics and mechanisms The session will focus on the mechanistic processes underpinning the nucleation process, i.e. whether single/2-step, progressive/instantaneous, homo/heterogeneous etc. and The role played by secondary nucleation processes in modifying nucleation behaviour will be examined and the session will also seek to examine the latest research in kinetic modelling of the nucleation process. Solvent interactions as determinants in the nucleation pathway This session will seek to examine the role played by crystallisation environment, notably solvent choice (whether polar/apolar, protic/aprotic and molecular size/shape) and resultant solution structure, in dictating the nucleation process. The role played by solution ideality as well as the influence hydrogen bonding and synthon architectures for directing specific solute-solute interactions will be examined. Nucleation in complex multi-component and multi-phase systems This session will examine nucleation within complex crystallisation environments for situation where the presence of multi-components and phases are found to significantly change crystallisation behaviour and crystallisability of a material, e.g. in an extreme case leading to oiling out. Understanding the influence of phase composition, molecular speciation and chirality on behaviour and how this effects the solid form properties of the resultant crystals produced (polymorphic form, crystal size and crystallinity) will be also examined.