> Do not confuse with UTC, it's not the same. GMT as a time standard is defunct. The Mean Sun no longer traverses his notional sky. GMT as a civil time zone

> Do not confuse with UTC, it's not the same. GMT as a time standard is defunct. The Mean Sun no longer traverses his notional sky. GMT as a civil time zone is based on atomic measures[0]. It is not measured from the meridian. This is the phrase used to indicate this in UK legislation: In these Regulations Co-ordinated Universal Time (UTC) is the same time as Greenwich Mean Time (GMT) [0] Time scale UTC(NPL)