Southern Railway - 377 class - north of Newhaven - 26.11.2011

The diamond-shaped sign, one of four - two on each bank, indicates “S.E.E.B 33,000 VOLTS ELECTRICITY CABLE” - under the river.
The trouble with DMUs & EMUs, like this one, is that you don't get a sense of the direction in which it is travelling. In this case it's right to left, if you don't know the area.
The houses are at the northern edge of South Heighton