If it is 20:00UTC then it is 20:00LMT on the Prime Meridian; 0800
LMT at the Prime meridian is wrong.
20:00UTC
20:00UTC 20:00UTC
060ºEx4m
4:00
090ºW x 4m 6:00
120ºW x 4m 8:00
24:00LMT X
14:00LMT p
12:00 X