"alex_t" wrote in message
...

Clearly they are worried about people piling over the platform edge,
hence
the barrier, so why didn't the gap in line with the steps and the end of
the
bay (all of about 20ft?) get filled in, so that pax from and to the
bridge
would move along the platform, in stead of across it?

Because trains do not go further the platform - this platform is very
long and the first door of the first carriage is usually right
opposite the new bridge entrance.

Would that still the case if they used 12 car trains? I'm not sure of the
normal length on those services...