ID Request

Neighbour and I are trying to ID this one.

Bought 'We think' from B&Q. 

Was purchased a 'standard' though it's now thrown up shoots from the base (though this isn't a problem).

1.5 metres (4ft) tall

Blue flowers

Any ideas?

  No idea why the forum has altered the photo's orientation.

Salvia Guaranitica 'Black and Blue'?

If not I think it's some other kind of Salvia (Sage).

It could be a solanum of some kind, though the leaves suggest a heliotrope.  BUT the flowers (although blue) are not at all heliotrope-like. The flower shape definitely looks more salvia-like, so my money would be with Leggi.