[time-nuts] GPS week rollover

[Steve Olney]

Just curious - WNRO is not an issue for me even if my GPS receivers are 
affected - but I note that the time of rollover is being quoted as 
23:59:59 UTC 6th April.

Wouldn't the time actually be 18 seconds earlier ? - i.e., 23:59:42 - 
due to leap seconds ?

BTW - I'm not clear about GPS time vs UTC (which is probably relevant to 
the above).  Any pointers to a clear explanation ?

Cheers

Steve