Lettuce seeds from Kings Seeds - not Cocarde

Side view of mystery lettuce

I bought a packet of Cocarde lettuce seeds from Kings Seeds last year on a recommendation from a friend. The packet was labelled Cocarde, but the lettuce is a completely different variety.

However, they are good, tasty lettuces which have grown well and resisted bolting. I’m now trying to work out what variety I’ve got so I can re-order.

Any suggestions?