englishal.
Re-the Manchester Low level route. The route is a designated route as Stoney X quotes in his post outlining the ANO. Therefore the 'alight clear' rules apply. I'd say you would have no problem complying with this except for the Warrington portion. Personally I always transit East of Warrington where there is a large area of sports fields and waste land which runs for some distance up to the Thelwall viaduct. Wouldn't really want to try and land on it though!
Spiney