Thanks Brian.
Based in Hampshire. Just outside Portsmouth.
Would you suggest doing the entire tree at the same time or one pad at a time.
First of all.elm like all deciduos trees need to look like decidous not like pine trees with pads.
^ This is the proper care - once the foliage has been set and refined. In the case of this tree, because he is in zone 9a (very mild winters) I would definitely clean up all the foliage now, while the tree is as dormant as it is going to get. It is important to remove any of the extraneous growth (outside of the margins of the foliage outline, perpendicular upward growing, perpendicular downward growing, crossing, parallel, more than two branches at a fork, etc) so that when the tree pushes new growth in the spring, it is pushing growth where you want it - and not where you don't. Then you can wait for the new foliage to extend, start to harden, and then cut back to two leaves. At this point the tree (being an elm) will push a lot of interior/dormant buds and your growth for the rest of the year will be much refined and compact.We typically let the elms extend their spring foliage until the leaves start to harden off. Then we trim the new growth back to two leaves across the entire plant.