All you need to know is how many hours ahead of your time zone it is in
London.If where you live and y'all do change your clocks twice a
year,(England does) then you will always know what time it is
GMT.Otherwise,you will have to think that one hour difference.England
does change their clocks twice a year like some parts of America.UTC is
the same as GMT is the same as Zulu
cuhulin