If you ever see a man in dark glasses approach someone playing a public piano and he asks, 'Mind if I have a go? Um, where's middle C?', don't be fooled. It could be boogie woogie virtuoso 'Dr K' - ...

The piano at London's St Pancras station has been sealed off and is allegedly being guarded after a clash between a pianist and Chinese tourists. Brendan Kavanagh, who also goes by the name Dr K, ...