An ice age esker, an Anglo Norman motte and a large-scale residential development of 177 apartments on Howth Head: throw in EU wildlife protections and an oblique attack on domestic law and from this one case you will get a sense of the ingredients that make up a typical High Court strategic housing planning challenge.  The action in question was taken last year by north Dublin residents opposed to An Bord Pleanala fast-tracking permission for apartment blocks of up to five stories in height across three sites in Howth. The developer was Crekav Trading, a subsidiary of Pat Crean’s Marlet…