Fixed formations quite often get turned the wrong way round when engineering works are in place, a good example on the WCML is works between Preston and Carlisle when Pendo are dragged over the S&C . Virgin normally try to ensure that any turned this way are turned back a.s.a.p during the engineering works by taking them b oth up and down on the S&C.
Similar situatilons can arise with diversions in the Birmingham area.
Davat.
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