It is the S&P custom, going back at least 350 years, to say certain selihot along with the Evening Service, immediately after the Amidah and before Kaddish Titkabal.
The custom continues today in both Amsterdam and New York, however in London it was recently discontinued in deference to a ruling by Rabbi Ovadia Yosef, based on kabbalistic tradition, that selihot should not be said before midnight.
The following is an example of the first of the evening selihot, which is the only one that does not also occur in the morning version. The chant used is the regular New Year chant for biblical verses.
To download a ZIP file containing all the files on this page, click here: Selihot.ZIP (73 MB)