Boris Johnson appointed 16 new peers at Christmas taking the total to 52 in 2020 a move which raised the concern of Lord Speaker Norman Fowler.
Appointees included Scottish Tory MSP Ruth Davidson, Brexiteer former MEP Daniel Hannan, and Chair of Keir Starmer s leadership campaign Jennifer Chapman.
But critics say the Chamber is being stuffed with Tory and Labour donors and not accountable to the people, with peers entitled to a daily allowance of up to £323 outside normal Covid-19 pandemic times.
Tommy Sheppard, vice chairman of the Committee which was formed this week and SNP MP said: “The SNP welcomes the formation of a cross-party group to pursue electoral reform.