A local line for us (I can't write "my local line" any more, as Crossrail has usurped that!).
It was first partially dieselised with 'Yellow Diamond' sets from the pioneer East Anglia pool, but these didn't last for long, then the high-powered Derby-built hydraulic transmission units, as said above they were all Stratford had, until the 1970 Lea Valley electrification, when these were all sent to Finsbury Park. There were some Birmingham RCW sets that replaced these for a while, but the Cravens sets, based at Stratford but shared with Finsbury Park, became standard until the electrification. I saw the last one of these ever, departing North Woolwich on the Friday night before electrification to a detonator fusillade, described separately on a post elsewhere here, as apparently did one or two members.
If you want a real oddball, in 1988 the musician Jean Michel Jarre did a spectacular music concert in the Royal Victoria Dock, before the DLR opened there. Network South East must have been really stuck for how to augment the service to Custom House station, and sent over a couple of 3-car Pressed Steel units from Old Oak Common, to run a shuttle from Stratford, which I saw unloading at Custom House having been packed to the gunwhales. So you could always mimic that!