The reason for this was the decision of Supreme Court, which on September 24 declared illegal Johnson's decision to suspend parliament.
The center-left Welsh party put forward a proposal for impeachment; it was discussed at a meeting of politicians on September 26. An initiative may be presented to the House of Commons next week.
If the lower house of parliament votes in favor of its adoption, a lawsuit may be launched against Johnson.
Earlier it was reported that British parliamentarians were preparing lawsuits in case Prime Minister Boris Johnson refuses to postpone Brexit's delay.
After work and pensions minister Amber Rudd’s quit late on Saturday over his Brexit policy, the ministers said Johnson was determined to “keep to the plan” to leave the EU with or without a deal to ease the transition.
Foreign minister Dominic Raab described continuing “intense negotiations” in Brussels, and emphasized that Johnson’s government would not be deterred from what some describe as a hardline strategy on Brexit.
“I do also think that on some of these key issues, people need to understand, and the voters get it, that we’ve got to keep to the plan,” Raab told.