A standfirst is:
an introductory paragraph in an article, printed in larger or bolder type or in capitals, which summarizes the article
Collins English Dictionary - Complete & Unabridged 10th Edition. Retrieved December 28, 2017 from Dictionary.com website http://www.dictionary.com/browse/standfirst
What is the opposite of a standfirst — a final paragraph that is distinct from the main body of the article, something that if it were online might be a call to action or in print the address to write a letter to.
Although not a perfect example here is an article from the Evening Standard.