Warburton has floated the idea of a ' B ' side competing in the SPFL .
That idea was kicked into touch when former SFL chief David Longmuir put it on the table in 2013 .
Warburton has floated the idea of a ' B ' side competing in the SPFL but that idea was kicked into touch when former SFL chief David Longmuir put it on the table in 2013 .