"asdf" wrote in message
...
On Wed, 7 Mar 2007 12:20:15 -0000, John Rowland wrote:

I am not sure
why Blackfriars was ever considered as the changeover point, especially
since catenary would increase the visual intrusion of the bridge over the
Thames.

Perhaps because trains don't normally stop at City Thameslink on
Sundays, Saturday evenings, and during the night. If the changeover is
there, they'll all have to stop there all the time.

Hasn't it now been established that modern units can changeover on the move,
especially from AC to DC? The 377s on the WLL definitely can, in both
directions.

Paul