I was just doing a routine check of my tyres, making sure they are all wearing properly and are okay, when I noticed this:
How bad is this - safe to drive on for a little while? It's obviously not good but I'm no expert on tyre construction to be able to say for sure.
Edit: Darn it, it seems illegal!

How bad is this - safe to drive on for a little while? It's obviously not good but I'm no expert on tyre construction to be able to say for sure.
Edit: Darn it, it seems illegal!