According to RTT there won't be any LHCS duties, but during the works there'll be a saving of up to three diagrams, so it's presumably thought that loco-hauled workings won't be necessary.
Thats still a shame because an extra 3 x 185s on south TPE services would provide temporary relief for overcrowding. So according to RTT the Mark III sets are not due to start services until end of July now?