It's not a very clear picture under magnification, but it looks like Linaria vulgaris, common names Toadflax, wild snapdragon, butter and eggs

I agree Bam.

Thanks Bamboo and Loosestrife for your help , very much appreciated.

Might I suggest that you don't transfer it to a border, it spreads terribly & although it's pretty flower, it can become a pest, so keep it in the container.