Originally Posted by
inOban
Two changes and about 6 hours. Change at Waterloo to Northern line and then Euston to Glasgow
That is by far the quickest way of getting from Southampton to Glasgow by train.
The same applies by travelling from Southampton to Manchester via London Euston.
Quick, fast, and easy with a good schedule. It's a lot quicker than a lengthy cross-country railway journey.
The London underground might not be for everyone but there's always the option of getting a taxi between London Euston and London Waterloo..