The Astronomical Almanac (2019) says
∆UT = UT1 - UTC
DUT1 = predicted value of ∆UT, rounded to 0.1 s, given in some radio
time signals
(Unfortunately, this scan cuts off part of the leftmost characters. But
you can deduce them, except perhaps Ee and Eo: equation of the equinoxes
and equation of the origins.)
https://archive.org/details/binder1_202003/page/n121/mode/2up?view=theater
IERS Bulletins A and B say "UT1-UTC" instead of ∆UT. I think that's a
good idea. It prevents confusion about the sign.
The current version of Bulletin A estimates UT1 will lose about 0.1 s
with respect to atomic time during the next year.
https://www.iers.org/IERS/EN/Publications/Bulletins/bulletins.html
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