https://www.ciwem.org/news/engineering-council-society-of-environmental-engineers-(see)-update
https://en.wikipedia.org/wiki/Society_of_Environmental_Engineers
https://professionalengineeringukandothertopics.wordpress.com/2019/09/26/the-legitimate-uk-society-of-professional-engineers-speng-uk-is-no-more-in-existence-a-reminder-14-august-2019-latest-updating-22-september-2019-dont-forget/
It is a my personal opinion that in the years to come (within the 2020-2030 decade) most of the smaller UK engineering Inst, and Soc. shall be destined to disappear and only the most prestigious will remain but in turn they shall be forced to amalgamate in order to validly face the fierce challenges before us!