Funnily enough, I have a trip planned to the gallery next month, and used to live near 'the cliffs'. Shame it's so easy to find the musician, though, which rather gives the whole game away.
You appear to be a well travelled man GG - almost as much as Mr Fautley . . . just a minute . . . ? Given your knowledge of the vicinity, I expect that you did not need to even cast a glance at your railway map on the stairs to confirm the stations. Hope you enjoy your visit next month!
Tilly . . . given your location you may, possibly, be aware of a place that is associated with the musician?
Assuming I have correctly identified the station where the puzzler and LLF got on the train, I remember I once went to a nearby venue to see a musician in concert, (well . . a 'gig'). It was all very colourful!