If you've been in London train station St. Pancras, you may be aware that there's a piano in permanent situ, open for anyone to sit down and play a few songs.

In fact, it's quite a lovely way to spend some time as you wait for your train ( (providing the person playing is decent, that is).

Commuters this morning were treated to an impromptu performance by a more well-known name than most - i.e. John Legend - who hinted that he might tinkle the ivories as he was passing through on his way from Paris... no doubt making more than a few people miss their train in the process.