Oooh... I've found +100year-old wood still embedded in our streets.
Well, your honour, I was wandering along Scrutton Street, London EC2, heading in a south-easterly direction, when I happened upon this manhole cover outside No.44, opposite No.51:
Nice. So I retraced my steps and found more wood in another manhole just a few metres away outside No.48-50 – it was hard to make out the how many segments contain wood being as it was filled with rain that day:
I thought about hunting for more, but the weather was miserably cold and I'd been on my feet all day, so I will check next time I am in the vicinity.
To see all the woodblocks I have found so far, click here. A guided walk on this subject should be available by June via janeslondonwalks.