All I can do is express surprise as aircraft on final for 20 do not overfly the city of Winchester so any impact is going to be minimal. Could it be the well heeled residents of Twyford and Shawford, within the Winchester constituency, who have put them up to it?
Also, could this be the consequence of the apparent AGS' own goal, discussed in posts # 342-345, of indicating the need for an extension is to cater for larger aircraft? This is of course factually incorrect as there is nothing larger going to use the airport than can already do so.