Boris Johnson told Leo Varadkar a no-deal Brexit would be “a failure of statecraft”
The five-week suspension of Parliament will begin later, after MPs again rebuffed government calls for a snap election.
In all, 293 MPs voted for the prime minister’s motion for an early ballot, far short of the list needed.
Earlier, foe MPs justified there is no way to back the push for a 15 October poll, demanding a ordinance blocking a no-deal Brexit must be implemented.
Boris Johnson has been cautioned he could face legal action for spurning it.
Ministers have called the law “lousy” and said they would “test to the limit” what it required of them.