That's the start of the Iffley backwater and where it comes off the Thames at those small arched bridges. It starts at Long Bridges open air bathing place (you can't see it now but it's all behind the hedges) then runs around the back of the field, splits briefly just above Donnington Bridge road/Weirs Lane where the big black pipes are and there is a very small weir there at back of gardens. Then both of these run under Donnington road (there are 2 bridges on this road) and join up at Weirs Lane/Canning Crescent (more back gardens). Then it runs around the back of the old hospital and under the southern by-pass (just above the main roundabout at Red Bridge park & ride area and just close to where the stream joins) and finally joins the main Thames again further down (having gone behind Kennington lakes) at the big black arched railway bridge at Kennington (which we stupidly used to jump off in the summer !).Well it's called the weirs mill stream donnington in the club book although I guess technically it has a sluice rather than a weir. Comes off the Thames at the bend upstream of donnington bridge then runs under the bridge itself to round the back of iffley meadows before joining Hincksey stream a short distance before that rejoins the Thames.