i couldnt find it on this one
http://www.bench-marks.org.uk/
I'm sure you'll have read about the OS complete database file..
I try and break down into local areas using that as its a boggger of a file to work with.
Easy, if you find one, just note the OS locator, sadly they don't name, they just give you a clue where the mark or whatever is.
I found three yesterday by just having a nosy.
I did a print out for the Dumbarton area yesterday but I'll leave that for another day, it's a town I don't know too well plus many, many marks are well gone.
As I have written earlier, I use OS Locate on my phone to pinpoint the locale and match when I get home I use the mail to me the location by email, save writing it all down.
I should really just chase the benchmark site ones it's much easier...