Name of the blue flowering plants on GW (Friday 6th May)

Can somebody please confirm the name of the plant on GW last night (Friday 6th May).  They had blue flowers on a single stalk and grassy like green leaves.  The grower assisted Chris Beardshaw last year at Chelsea and did her own stand at Malvern and got silver.  Tried various connotations of the pronunciation of it but can't find it.  Help!