Martin Underwood wrote:

So did the old bridge have a straight-line access to the trackbed coming
from the south and the station to the north, or was there a sharp kink in
the track at each end as *appears* to be necessary if it was connected
nowadays? I presume there was not a kink: the original bridge would have
been built inline with the track and the platforms and maybe the new bridge
would have had the deviated kinked route, though track has probably been
slewed since the new bridge became the only one.

Was the bridge deck demolished (rather than simply being left unused)
because it had become unsafe or for its scrap value?

http://www.subbrit.org.uk/sb-sites/s...ge/index.shtml
contains details about the south end of the bridge and a map