It is a very confusing industry when you research Biomass. It appears the old UK government wanted to reduce carbon emissions by set time frames and put about policy to encourage this through the use of sustainable energy supply.
The current government is yet to confirm the new plans and as such it seems to a "non expert" researching this subject that energy companies are attempting to push through profit generating projects on the back of previous government legislation under a big green umbrella, with no fixed regulations to ensure that Biomass is sustainable, environmentally friendly and generally helping maintain a neutral carbon cycle.
The theory goes that Biomass fuels only release the carbon they extracted from the atmosphere during the growing process when burnt thus not adding any extra carbon than was already there. The only issue with this is that there are associated carbon issues with the harvesting, processing and delivery of the Biomass fuel with carbon being used from fossil fuel sources at all points.
The initial construction will have a very heavy carbon footprint when you think of the fossil fuel use in the manufacturing of the materials for the construction and build plus the actual build process itself. There are no statistics on the carbon/fossil fuel use in the creation of such a large power plant in the first place and how many years it will take before this initial carbon/fossil fuel resource use was made up for in fossil fuel use reduction gains.
As such it can be seriously questioned whether this is a true low carbon solution or something that looks good as a project but when closely analised has more holes than a cheese grater!