The rise of food security up international political, societal and academic agendas has led to increasing interest in novel means of improving primary food production and reducing waste. There are however, also many 'post-farm gate' activities that are critical to food security, including processing, packaging, distributing, retailing, cooking and consuming. These activities all affect a range of important food security elements, notably availability, affordability and other aspects of access, nutrition and safety. Addressing the challenge of universal food security, in the context of a number of other policy goals (e.g. social, economic and environmental sustainability), is of keen interest to a range of UK stakeholders but requires an up-to-date evidence base and continuous innovation. An exercise was therefore conducted, under the auspices of the UK Global Food Security Programme, to identify priority research questions with a focus on the UK food system (though the outcomes may be broadly applicable to other developed nations). Emphasis was placed on incorporating a wide range of perspectives ('world views') from different stakeholder groups: policy, private sector, nongovernmental organisations, advocacy groups and academia. A total of 456 individuals submitted 820 questions from which 100 were selected by a process of online voting and a three-stage workshop voting exercise. These 100 final questions were sorted into 10 themes and the 'top' question for each theme identified by a further voting exercise. This step also allowed four different stakeholder groups to select the top 7-8 questions from their perspectives. Results of these voting exercises are presented. It is clear from the wide range of questions prioritised in this exercise that the different stakeholder groups identified specific research needs on a range of post-farm gate activities and food security outcomes. Evidence needs related to food affordability, nutrition and food safety (all key elements of food security) featured highly in the exercise. While there were some questions relating to climate impacts on production, other important topics for food security (e.g. trade, transport, preference and cultural needs) were not viewed as strongly by the participants.

Highlights: Psyllium husk heteroxylan is fractionated by a straightforward method  Fractions show distinct rheological properties  Arabinose/xylose ratio can be estimated by 2 nd -derivative FTIR and 13 C NMR spectra  Composition and spatial arrangement of sidechains are influential  Two hypotheses were proposed

Highlights: The incorporation of (fibrillated) cellulose strengthened gluten free doughs  The generalised Maxwell model was applied to analyse dough rheology  The incorporation of (fibrillated)cellulose influenced the later stage of proofing  Volume and water competition dominates the thermal rheological behaviours  Loaves with (fibrillated)cellulose were smaller with harder, denser but finer crumb

Gluten free, dough rheology, dilution effect, response surface method, principal component analysis.

Highlights: Flocculates of fibrillated cellulose is promoted by heating and centrifugation  Unheated mixtures can be described as binary phase dispersions  Heated mixtures form interpenetrating composites with psyllium husk heteroxylan  Psyllium husk heteroxylans weakly associate with (fibrillated) cellulose  Increased fibrillation leads to a denser or clumped structure of the mixtures