Two , you have not had a statutory notice served on you
Three ,the apparatus you wish to decommission is not owned by you .
Four , by decommissioning it you will be damaging property not owed by you, whereas in the case you mentioned it only temporarily prevented a right from being exercised . It had nothing to do with interfering with property owned by others and all work was being performed to property owned by the person the notice was served on.
Five ,the system can only be condemned by the EA and it’s possible they could under the rules allow the continued operation of the system.
Six , you are not an operator of the equipment . The neighbours are the operators as they have a documented easement allowing it to be on your land and are legally responsible for its maintenance . Providing the EA are aware of the situation they should serve any notice on them and no statutory notice should be served onto you. If one was served on you before you acted you would need to check out the legality of the notice as it may have been incorrectly served as the EA may not have all the information. The easy way to check how uptodate there information was would be to ask if it was served also on your neighbours
You need to ask the EA to visit your property. You need to inform them you are not an operator of the equipment . You do not use it , do not own the equipment and legally have no rights to interfere with the equipment and need them to serve a notice on the neighbours if the system falls foul of the law.
Thinking about it tHis equipment is not yours so how can you demonstrate it is not fit for purpose.How can you demonstrate that it would not be possible for your neighbours to gain permission from the EA to continue using it . It is possible under the right circumstances.To obtain a court order I assume I would need to go to court, demonstrate the law, then say 'look, the users have done nothing about this despite me giving them a years notice and the EA giving all of us 5 years notice' ?
This is something you need to speak to the EA about .Ask for a site visit. Document All information you give them . Keep copies of any letters you send out. Make them understand the situation ,that may be hard however as many people in there position take a blanket approach and don’t listen .
Lastly in your circumstances I would not do anything that could leave their properties uninhabitable without something on paper sent to you personally from someone with the legal authority to order you , under the law to decommission the system withou5 the agreement of those that use the system . That way you are covered should you get sued.