I wonder if someone might be able to help me with this.

I have a book in three parts and the author wants endnotes. No problem. 
I can produce those with \setupfootnotes[location=text] and then 
\placefootnotes.

However, I would like the header to read 'Notes' on the recto page (or 
indeed be blank with no header), but I am currently getting the header 
that belongs to the main setup for headers, which happens to be:

\startsetups[middle]

\hfill

\getmarking[section]

\hfill

\stopsetups

\setupheadertexts

[{\hfill\documentvariable{metadata:title}\hfill}][]

[\setups{middle}][]

How do I deal with the \placefootnotes command so that it ignores this 
and either gives me no header, or perhaps a new header with 'Notes' in 
place of [section] (which is achieved in centered position with 
setups[middle])?

Julian