I just couldn't find a suitable back scene so ended up painting one. It's fine if you don't look to closely (which is a bit hard because the layout is in a small space).
Actually, there are two bridges over the estuary. A steel structure for the mainline and wood for the branchline. Both are loosely based on the bridge at Barmouth, North Wales which is an incredible feat of engineering.
I saw the bridge for real again recently. I haven't got the colour of the wood right. It needs to bemore silvery grey where it's been bleached by the weather and salt.