Major disruption is expected after a main railway line collapsed in a “huge” landslip which left one track hanging in mid-air.The 44-metre landslip happened on the embankment to the north east of Hook station in Hampshire, on the line from London to Basingstoke.The damage has left only two of the four-track railway passable, with both these tracks designed for London-bound trains only.South Western Railway is advising customers to check before they travel and to plan alternative transport for journeys to or from the south or west of Basingstoke to London on Monday.Source: PA, Network Rail