Yellow flowered hardy plants (Lewes BN7)

Yellow iris, don't know what type and didn't think they were flag irises but digging them out we found rhizomes. Tall, very tough and spreading. Could they be wild iris?
Variegated lamia, energetic ground cover.
Winter-flowering jasmime, with roots or prunings that will root easily.

To collect Monday 11th afternoon or Sunday 17th. If you reply please tell me then when you'd like to come.