I noticed yesterday, approaching S.P.I.L.L. from the north, that we were
one of two trains running side by side through the tunnel into the
station. *(All trains were terminating there.) *



Bi-di west of SPILL has been in place for quite a while now.

Something like 12 months ?

ISTR the signalling was commissioned around about autumn 2009 and
allowed for in timetable from 12/2009. Or something like that.

Both A and B at SPILL are used at weekends, although things do not
seem fixed from one weekend to the next, it depends on what actual
work is taking place.

--
Nick