digging bars, good gloves, a VERY big screwdriver and a small handheld jigsaw (sort of dig down around stump and dig/saw out routes on way so you can dig/get depth and when a spade deep use screwdriver to poke out soil under stump and scoop out (gloves) so you can get a cut with the jigsaw at the roots directly under the stump that you can’t dig), elbow grease required as well.
My experiment – spade/high power hose/jigsaw, was only partly successfull – by blasting around roots you could see the problems but it made the ground too wet and hideously messy and I decided using a partly submerged electric jigsaw may have limitations as a good idea.
Our current house is in a road next to Orchard Way ………………..