Getting back to the issue of so few units being in service. The reason might be that if any more units are bought into use they would have to undergo regular maintenance.
I expect Wimbledon are at full capacity and can't take on any more units. So if you do bring in another 701 then one of the old ones would need to be withdrawn and scrapped.
When more drivers are trained then new units can be bought into use.
I expect Wimbledon are at full capacity and can't take on any more units. So if you do bring in another 701 then one of the old ones would need to be withdrawn and scrapped.
When more drivers are trained then new units can be bought into use.