i know its not the right time of year for this but I don't need it and its taking up room
Electric start
Port Agric Cutlet rotary topper/mower.
These are about the best tow behind mowers you can buy. Made by Port Agric who are a huge tractor implement company, all very high quality parts.
You can tow it behind more or less anything with a ball tow bar.
Very easy to set the cutting height and can be adjusted by a few cm at a time by hand. Its happy cutting thick brambles all the way down to lawn quality paddocks etc.
15hp Kohler engine (similar quality to Briggs/Honda etc - not chinese rubbish), electric and pull start, blades carrier is a huge thick bar with swinging tip blades (so they dont damage the engine/crank if you hit a rock). Plus spare blades can be picked up cheaply.
These retail at over £4000 so I'd be open to reasonable offers for a good used machine.