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\subsection{Possible Timescale}  The timescale is directly related to the Physics case, or better said, to the scientific interest of a collider. The TLEP design study is expected to deliver its conclusion in 2018, just prior the next update of the European Strategy. Should the case be still as strong as today, a go-ahead decision could be taken and the tunnel excavation could start at the beginning of the next decade, for a duration of four to eight years, with the simultaneous operation of up to three drilling machines. The construction and installation of the collider and the detectors would then proceed in parallel with the HL-LHC run for another four to five years. It could thus be technically envisioned to start the first TLEP Physics run as early as in 2030.  This starting date is similar, within Within  the rather large uncertainties on both sides, this starting date is similar  to that estimated for the ILC, which is given to be (2028-2030), should (2028-2030) in  adecision be taken soon -- the  {\em very optimistic but not impossible} scenario. scenario where a decision is taken very soon.  The physics programme of TLEP would consist of two years at the Z pole, one year at the WW threshold, five years at 240 GeV as a Higgs factory, and five years at the $\ttbar$ threshold. The effective duration of the running at each energy as well as the appropriate order will be defined according to the physics needs as more knowledge is acquired. The VHE-LHC would be installed from themid  forties onwards, and the physics programme could start in 2050 or thereabout. The TLEP and VHE-LHCdesign studies will be conducted in close coordination, with the aim of providing maximum flexibility on concurrent (but not simultaneous) operation and installation  of the two machines.