As I type I'm doing my 2nd "Service" scenario from Paddington to Reading on a HST, both of which have been given 27 minutes between leaving Paddington and arriving at Reading (perfectly fair and realistic based on real life timings). However, when doing the scenarios, sticking to the speeds (i.e. 40mph, 50mph, 100mph then 125mph out of Paddington), time just disappears. On the first one I completed I ended up 8 minutes late for absolutely no reason. And the one I'm currently doing (1C01 Paddington to Swansea), it's 0547 and I'm still 9 miles away from Reading. Has anybody else noticed similar patterns?