I`ve heard of the dreaded tick, mine don`t have it. I did check that when i went to have a look, is that not a slack timing chain?

It does purr like a kitten and goes very very well when its not playing up, bodywork is `tatty` to say the least with holes in the side of the f.bumper for the blue strobes, and roof is a bit funny from the sirens but in genaral that don`t bother me for the price i paid for it.