grows at work, bees, butterflies and moths love it,
Looks like plumbago, botanical name ceratostigma.
Info on habit and cultivation here if you fancy growing some in your garden - https://www.rhs.org.uk/Plants/104459/Ceratostigma-willmottianum-Forest-Blue-Lice-(PBR)/Details
that's the one
getting it going in the garden is exactly the plan