On Mar 12, 5:49*am, "Basil Jet"
wrote:
Shouldn't the high speed line run from St Pancras, as an extension (via
reversal) of the Kent domestics?

That would most likely cause a punctuality problem, just like on some
of the long XC routes. And in any case, Euston, unlike St. P, has
spare capacity (especially as the 9tph WCML service is likely to be
thinned out) so is an obvious choice.

Neil