I have already e-mailed " Shambles" on this. If the Landlord hasn't "ticked" the box one has the right to appeal to have it added. In so far as I been told ( This information was relayed to a councillor who sits on the licencing committee and took advice from the licencing officer) that one may play and sing between 8am and midnight inside the premises and indeed that is what we do. Also the Landlord was convinced that the midnight finish was only for instruments not for unaccompanied singing. However, if one interprets the rules there is enough leeway in the act to allow a decent folk night, I suspect some Landlords simply don't want them.
regards
Peter