=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 2001Jan02 :
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/
PRIOR TO 1963 VALUES BASED ON 8 READINGS/DAY.
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 11-JUN-91 :
Swansea             170/178 RLR(1961) is 13.1m below TGBM SS 6683 9204
=========================== BENCHMARK INFORMATION UPDATE ADDED  12-JUL-93 :
Swansea             170/178 RLR(1961) is 13.1m below TGBM SS 6683 9204
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 22-SEP-93 :
replaced by Mumbles
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 20-JUL-94 :
Replaced by Mumbles (170/179).
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 21-SEP-94 :
Munro/stilling well installed October 1959

