help with a mystery plant

Well this is my first post, this is a plant that is two years old but the first year it's flowered, we bought it as 1 of 2 hollyhock. It's flourishing in our southern england sunny garden. If anyone has any idea what it is we would really appreciate it. I've included two photos, just in case you can't tell the scale then it's about 5ft high.
Thankyou all in advance

 

Welcome seniormoment.
Possibly Crambe cordifolia.

Crambe cordifolia - Wikipedia, the free encyclopedia

 

Thankyou so much silver surfer, we had taken a photo to our local nursery but they couldn't identify it.
Well you've solved the mystery.

 

ooh! I really like that - i'll have to add that to my wishlist