=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 11-Jun-1991
Birkenhead(Alfred D)170/201 RLR(1964) is 15.0m below TGBM SJ3268 9011
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 21-Sep-1994
Lege gauge mounted over stilling well and maintained by POL
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 02-Jan-2001
Recent work on vertical land movements in the UK can be found from the University of Nottingham web site: http://ukcogr.iessg.nottingham.ac.uk/~eosi/
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 23-Jul-2015
The TGBM SJ3268 9011 is flush bracket 3978 which is listed as SJ 3267 9011 in the Ordnance Survey database. We believe this is a typing error in the OS database. Whichever SJ location is correct, the same flush bracket is being referred to.