Near-identical to a telemarketer who called yesterday with a number ending in -72 instead (instead of the -53 above).
Both numbers flagged by smartphone as "Suspected Spam".
Yesterday's number was a cold caller from a "compare energy prices" company, saying "we're wirkung with the government on their energy initiative" and trying to sell me solar panels.
The DoNotCall register seems to exclude these "working with the government" private companies trying to sell their stuff 😡
l deleted and blocked (same as for yesterday's number).

Ignore the call and blocked the number