Well while driving muppets round Stevenage lately, I have seen about 5 zs's a couple of zt and loads of zr and tf. Trouble is I can't go after them or all the old gits will start moaning i'm off route. None have Zs.co.uk stickers on though.
I saw quite a few, the other week when I drove the company van to our Stevenage depot. We will have to block them in and leap out and give them a flyer....