Watch for an LO closure on the NLL anywhere between Camden Town and Willesden Jcn, they will then run a service reversing at Willesden Low Level heading through Kilburn and South Hampstead and then through Camden Jcn onto the NLL. This diversion ran on several Sundays early summer this year so they are sure to do it again.
I remember a few years back a service running between Stratford and Queen's Park due to engineering works - it was via Primrose Hill and for some reason ran fast from Camden Road to Queen's Park. Seems nowadays if anything is diverted via Primrose Hill all trains will call all stations.
Ladies and gentlemen, there is currently a good service on all London Underground lines. We would like to apologise for any convenience this may cause you.