I've decided that the best way to use the space I've got in my workshop is to make everything move.
My planner-thicknesser already had a mobile base that I brought for it years ago, it works really well. I can tuck it in a corner when not in use (or under the mitre saw work bench I made the other day which still needs a top).
So I decided to go the next step and buy 2 more Axminster mobile bases for my morticer and bandsaw, this way I can push them up to the wall when not in use and have the middle area for assembly of larger projects when needed. I've been working on a large gate/outside door this weekend and so far having these machines mobile has been great (I think it will encourage me to keep the floor well swept so they move easily - not a bad thing).