Fine. Let me continue:

02:00;
05:00;
08:00;
11:00;
14:00;
17:00;
20:00;
23:00;

Divides something like this:

And ?? Fine
02:00; 05:00;
08:00; 11:00;
14:00; 17:00;
20:00; 23:00;

All I can say about the above is that the centre of any highs produced
by the second column can be placed left or right of the UK if the time
is nearer the half hour to or from Five or Eleven O'clock.

What might have been expected is that the time difference is not
related to the angle of arc that is observed in the sun or moon's
position in a Nautical Almanac. One would suppose it might have. But
if the case is the same one for wet spells the half hour of time
represents 5 to 10 degrees of arc. A two to fourfold difference.