A Stroud based community group is taking Gloucestershire County Council (GCC) to court to challenge the legality of a £650 million incinerator contract.
They are claiming the contract for the construction of the waste incinerator, which is located near junction 12 on the M5, outside of Gloucester, is illegal.
The first hearing is starting today at Bristol High Court - on Redland Street - where both the community group and the council will sit before a High Court Judge.
Community R4C claims this was done in secret with no opportunity for other companies to negotiate or tender for the contract which has been signed for 25 years.
The group has set out plans for an alternative waste treatment which could easily deal with waste produced within the county.
This would include a pre-treatment plant which would sort residual, or black bag, waste to recover valuable and recyclable materials.
The group is now demanding that the £150 million is given back to the public.
If successful, the group will be able to pursue the case for between £75 million and £150 million, and the money then returned to Gloucestershire County Council by UBB.
This would lead to substantial changes in the way the plant operates, including more rigorous recycling and protection of the environment.
Thousands of people objected to the building of the incinerator, as well as the whole planning committee.
We have every right to demand that the illegal subsidy committed to UBB is returned to the county's taxpayers and that we can move towards waste treatment which is sustainable and economic. CR4C has set out the framework for this and again invites the Council to enter into discussion with us to work together to these ends.
We carried out a thorough and compliant process when appointing and negotiating with UBB and as a result we cannot let the claims made against us go unchallenged. We are confident the legal process will conclude the claim is groundless.