A.J. Pollock exposed the principal figures behind "The Elim Evangel" and their activities - https://www.stempublishing.com/authors/pollock/Modern_Pentecostalism.html. Their work in Ireland commenced after a sister's prophetic vision.
The Foursquare Gospel Alliance's claim to any acquiescence by F.E. Marsh in respect of divine healing is dubious and sketchy at best. Can God not heal if He would? The recipe for divine healing of the Foursquares in their literature has no warrant in Scripture.
It would be interesting to see how some post-Darby "brethren" explored and pronounced on divine healing. James Boyd said on divine healing: "However, the door is open for those who have faith to use it."