As newly Independent MPs you should stand for re-election in your constituencies. It would clear the misunderstanding by those who think that you may have been elected as Labour MPs and will let the rest know how wide your rea; support base is.
While MPs are elected to represent a constituency rather than a party, MPs must appreciate that party activists give their time to campaign for them and party money is used to fund their campaign. People may also vote for them because they represent a particular party.
Should an MP resigns the whip, it would seem fair to the party, the activists, the constituents and the MP themselves, that they check their constituents still want the MP to represent them through a by-election.
Since this splinter group can no longer support our leader but stood on a Labour ticket for election, it would be hypocritical to remain as MPs without going back to the constituencies they are duty bound to deliver Labour policies - not the unknown policies of a small group who stand for who-knows-what!
Are these Mps democrats or autocrats? They are our representatives, if they no longer represent what they claimed to when elected, the people have the right to change their minds, after all "the facts have changed."