=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 11-Jun-1991 Southend 170/081 RLR(1964) is 12.1m below TGBM TQ8898 8303 =========================== FOLLOWING PSMSL DOCUMENTATION ADDED 12-Jul-1993 Southend 170/081 RLR(1964) is 12.1m below TGBM TQ8898 8303 =========================== FOLLOWING PSMSL DOCUMENTATION ADDED 20-Sep-1994 Stilling well gauges as follows; Jan 1929 - December 1944, Cary-Porter Jan 1945 - April 1950, Hughes (probably)May 1950 - Kent =========================== 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 17-May-2016 Southend data for 1998-2015 has been supplied by the Port of London Authority (PLA). Previous data ended in 1983 the PLA has confirmed that the datum for the data 1998-2015 remains the same. The values of latitude and longitude were also updated.