What you'll find is that Tata is paying but as its for one site,...

What you'll find is that Tata is paying but as its for one site, its not big $.

What I also think is the case is that Tata would have been pushed (or forced) to take up something to improve air quality tracking in order to manage it better. A google search will show that Port Talbot has one of the lowest air quality ratings in Wales. It is practically a steel mill town.

https://www.walesonline.co.uk/news/wales-news/tata-believes-can-make-huge-15425917

Natural Resources Wales has been active in ensuring any works, extensions or replacement works by Tata results in zero change or positive impacts in net pollution levels as evidenced below.

https://naturalresources.wales/media/676097/eprbl7108imv015-tata-port-talbot-decision-document.pdf

Private companies who have purchased air quality solutions (incl Odotech) generally don't do it out of volition as its a cost for a problem they don't care about. A regularly flagged customer, Morning Star Food processing, was essentially pushed the California state/country regulatory authorities to implement better air pollution management which resulted in them packing up Odotech (as evidenced below).

https://www.waterboards.ca.gov/rwqc...gstar_acl_cd/102_ms_acl_disch_rebut_exh_q.pdf

Seems many are focusing on the wrong points (i.e. the unknown $ amount) and not the bigger picture, as the environment becomes more important, and authorities more active in doing something about it, private enterprise will be pushed to take up solutions like envirosuite which is a much bigger market opportunity than governments using it themselves for landfill monitoring.