What cultural faux pas should I try to avoid making in Sheffield?

"It is important to be mindful of local customs and etiquette when visiting Sheffield. It is considered impolite to be late for appointments or social engagements, so it is important to arrive on time. It is also important to be respectful of local religious beliefs and practices, and to dress appropriately when visiting places of worship. Additionally, it is important to be aware of the local language and to avoid using offensive language or making inappropriate jokes. Finally, it is important to be respectful of the local environment and to avoid littering or damaging public property," remarked another expat in Sheffield, England.