The 7 car 385s and 8 car 365s do a pretty good job of swallowing up the passenger loads at the moment and I've never had a problem getting a seat even during the peaks. I do think 6tph will be needed in the long term during the peaks if Network Rail can eek out capacity and get the Almond Cord done. Late evening services are quite busy too - it would be good to have 4tph a little later after 7pm.