Bollocks, Nigel.
You will notice I have not put this in quotation marks, because I am saying it now in the form ofa letter. Though of course it could be considered that I am quoting the phrase that I used in a previous post, so I could write "Bollock, Nigel" quite legitimately.
A pedant, however, might say that as I actually wrote "Bollocks, Nigel" (with quotation marks) in the previous post, I should actually write '"Bollocks, Nigel"' now. Or strictly, of course, "'" Bollocks, Nigel"'".