"Charles Ellson" wrote in message
...
On Wed, 29 Dec 2010 16:21:33 -0000, "Paul Scott"
wrote:

HSTs (rather than Mk3 coaches) are only cleared into platforms 17, 18 and
19. As this is a subset of the platforms allowing Mk3 coaches, the
suspicion is that it's the power cars themselves that are the critical
issue
for gauging.

Isn't it the trouble with part of the linkage on some Mk3 bogies being
liable to argue with the conductor rails at some locations ? Various
articles found via Google suggest that most but not all Western HSTs
have short swing links so if there is the odd chance (or the
certainty?) of the wrong one turning up then somebody could be
shutting the stable door before the horse bolts (or goes off bang) ?

Diagramming the correct trains fitted with SSL bogies has to be taken as
read, surely?

I've discussed this in another forum and it has been stated there that the
main gauging problem within Waterloo is the crew access steps on the outside
of the power car bogies. There are also issues with some stations between
Staines and Reading, (not relevant to the current situation) where there is
a 5 mph speed limit for HSTs due to the same factors.

Paul