"bob" wrote in message
...

If we are serious about making the change, the place to start is to
build or modify some UK loading gauge stock with retractable steps
that can be used to bridge the gap to UIC platforms (in the way
Eurostar does). Once all trains on a particular route have such
stock, platforms can be modified. Once all platforms are done, proper
UIC stock can be brought in, and the step equipped stock can be
cascaded to another route to be converted.

This is just after you've rebuilt every overbridge, underbridge, tunnel,
viaduct and repositioned every other conflicting lineside structure on the
route.

That'll be simple won't it...

Paul S