Coalition Labour was a description previously used by the Labour Party in support of candidates in the 1918 General Election who supported the ruling coalition. Only two, John Robert Bell and James Parker, received a Coalition Coupon, and they were wrongly identified in official coalition literature as Coalition National Democratic and Labour Party and Coalition Liberal candidates, respectively. The National Democratic and Labour Party was a separate organisation which also supported the Coalition and had a background in the Labour Party.
There were five candidates in the 1918 General Election, of whom four were successful:
References
Coalition Labour Wikipedia(Text) CC BY-SA