[NTG-context] Letter module: Subject below opening

British letters typically have the subject below the opening. A stackexchange user asked many moons ago how to accomplish this in ConTeXt, and received a rather hackish response (https://tex.stackexchange.com/questions/22438/how-to-place-the-subject-line-...). ConTeXt and the letter module have changed a lot since then, if my experience is correct. Is there a better solution than given there? Best, Parchd.