Like many main line termini, St Pancras was quite a circus in the 1970s with Peaks and 47s coming and going, and associated uncoupling and cleaning activity. A shed full of diesel fumes which could make your eyes smart, and an indefinable and not particularly pleasant smell in the carriages.
One of the things a modern user would find remarkable is how quiet St P. was outside the rush hours, and down at heel. For years the ticket office was a portacabin, and most of the interesting architectural detail was covered up. Even then I used to wonder why a window marked "tickets" or a door signed "left luggage" would generally lead to a store cupboard. After the Manchester and Glasgow trains finished St Pancras entered a twilight phase that seems evocative in hindsight, but was pretty grim as a portal to London and the Midlands (plus an occasional Sheffield and very occasional Leeds train). It was only cleaned externally in about '84 (?), before then it carried a century of London soot. Bear in mind it was due to be flattened in the sixties, unthinkable now but more than a possibility back then.
One of the things a modern user would find remarkable is how quiet St P. was outside the rush hours, and down at heel. For years the ticket office was a portacabin, and most of the interesting architectural detail was covered up. Even then I used to wonder why a window marked "tickets" or a door signed "left luggage" would generally lead to a store cupboard. After the Manchester and Glasgow trains finished St Pancras entered a twilight phase that seems evocative in hindsight, but was pretty grim as a portal to London and the Midlands (plus an occasional Sheffield and very occasional Leeds train). It was only cleaned externally in about '84 (?), before then it carried a century of London soot. Bear in mind it was due to be flattened in the sixties, unthinkable now but more than a possibility back then.