Blue flowers in street

Blue flowers in street

Observation - Blue flowers in street - UK and Ireland. Description: Not garden or park but at edge of city pavement. Sprawl of a plant at top of subways steps. Low growing. About four inches high. About a foot long. Leaves inch and a half? Flower buds a centimeter? (Didn't have ruler. Didn't have time for coin.)

Not garden or park but at edge of city pavement.

Sprawl of a plant at top of subways steps. Low growing. About four inches high. About a foot long. Leaves inch and a half? Flower buds a centimeter? (Didn't have ruler. Didn't have time for coin.)