I'm a bit out of the loop as well Adey. All I ever see are 66's, so if you're seeing 60's as well then you're one up on me.
I think that there are still 20's, 31's, 33's, 37's and 47's running, but owned by private companies and so you are unlikely to see them unless you live in the areas that those companies operate in. I know that the DRS Class 20's have operated over my local route (the Saltend branch in Hull) on weedkilling trains in the last year or so, but I missed out on seeing 'em.
Of course, if you ever win the lottery (like I plan to do), then you could buy your own Brush 4!
