my understanding is that hem heath at 1062m was the deepest shaft sunk in europe. i worked there from 1985 to 1990 and can confirm it is a long way down. :)
I have Hem Heath at 1037m -"the 3rd deepest in the UK" - after the Wolstanton shafts.
(One of the problems with some recorded depths are that there is usually a sump below the lowest landing and depths aren't consistently given to one or the other. For example the Haig (Cumberland) shafts wound from 1136 ft and this is often recorded as "depth" whereas the actual sump bottomed at 1200 ft in each. The nearby King Pit is always given in histories as "160 fathoms, the deepest pit in the country in 1796" but it was another 42 ft deeper still to the sump -making it the first to go over 1000 ft).