www.theguardian.com/media/2014/oct/13/leaders-debates-snp-green
I can understand that it would be hard to have a TV debate with five leaders, but the Green party has the same number of MPs as UKIP.
I feel a better solution would be for views to have a phone in vote on which three political parties they want represented in a TV debate. Then the Green party would at least have some chance of showcasing their views if viewers were interested.