A few shots of progress to date - firstly the overspill which is almost complete - the 'steps' need painting the correct colour; I had no idea that Humbrol 'Matt Olive Drab' (number 66) and 'Matt Olive Drab' (number 155) were different colours hence the greeny shade on the lower steps (Matt Olive Drab 155) as compared with the correct shade on the bridge section (Matt Olive Drab 66!). The capping stones are almost done - they need toning down/weathering and those in the foreground won't proceed much further up the wall, as the upper areas of this side of the structure on the real thing are 'concreted' over as part of repairs made when the structure partially collapsed, I believe in the late 1940's. The large concrete supporting struts in this area will be added when the overflow is in place on the layout and sealed against any water leakage.
This is a general view of the layout - the bridge over the canal is partially mocked up in the foreground while the 6 road fiddle yard is to the left of the photo.