Alister Jack did not vote in favour of a report which said that Boris Johnson had lied to parliament about partygate because he believed the sanction was "excessive".
Some 354 MPs voted in favour of the privileges committee's report on Monday night, which said that Johnson should have been suspended from the House of Commons for 90 days if he had not resigned already. It also recommended he is not given an ex-MPs parliamentary pass.
Only seven MPs voted against the recommendation, but hundreds did not show up or chose not to vote. These included Jack, 12 SNP MPs and Prime Minister Rishi Sunak.
