Harvey's rare bit

If we have any hope for this week, it's that this clip goes viral.

Playing a couple of gigs over the last year or so, PJ Harvey has been debuting a new song called Let England Shake. Over a looped sample of The Four Lads' original of Istanbul Not Constantinople it involves Polly thrashing away at an autoharp not entirely in standard tuning with cryptic but fairly politicised lyrics atop.

Where, do you think, would Polly choose to give this fairly eccentric song by her recent standard its first wider airing?

This morning's The Andrew Marr Show. Obviously. (Interviewed her, too) Which would be bizarre enough, were it not that watching intently on with Marr was Gordon Brown.