According to Realtime Trains the route and timings were;
<p>Wembley Inter City Depot [XWF]...2104.......2054..10E
Harlesden Junction...........................2115........2112......3E
Willesden West Ldn Jn.....................2118........2115......3E
Camden JunctionB............................2121 1/2..2120......1E
Camden South Jn..............................2122.......2121.......1E
</p>
London Euston [EUS]........................2128.......2124.....4E
train_photos
CC BY-SA 2.0
<a rel="nofollow" class="external free" href="https://www.flickr.com/photos/99279135@N05/41310221852/">https://www.flickr.com/photos/99279135@N05/41310221852/</a>