T1 will probably match Her Majesty in reaching a platinum jubilee, ten years from now. One of the underlying premises of the MAN-TP business case was to shut down T1 with its associated operating cost. However that was before the logistics were fully examined. So much of the T1/T3 combo is umbilically linked, making it especially difficult to simply isolate and decommission T1. I'm two years out of MAG now and so not privy to the latest thinking but I know there's no easy solution to this one.