The FlyDSA Arena in Sheffield have converted to cash free payments at their food concessions. Knowing that this will have an impact on girls attending the Big Gig, Girlguiding have negotiated provision of a limited number of cash payment outlets.
It would, however, be a good idea to share with your local volunteers that this is the case so they can be prepared (there is, for example an app they could download which would allow them to make cashless payments on behalf of their group). Information about this and everything else they need to know to prepare for the event can be found on the Information for Leaders page on the Girlguiding website. Information will be coming out within the next week to the people who have put their names forward to volunteer.