Coastal plant, bit like lesser toadflax

Coastal plant, bit like lesser toadflax

Observation - Coastal plant, bit like lesser toadflax - UK and Ireland. Description: Don't know what this is, quite like centuary but the flowers are wrong, like lesser toadflax but flowers not in pairs. About 15cm tall, leaves approx. 1.5cm, flowers approx. 8mm

Don't know what this is, quite like centuary but the flowers are wrong, like lesser toadflax but flowers not in pairs. About 15cm tall, leaves approx. 1.5cm, flowers approx. 8mm