Jersey Tiger Moth - looks like a hang glider!

I thought it was a Red Admiral when it flew past as it's under-wings are those colours (click here) - but when it settled it transformed into this totally different beautifully symetrically patterned beastie. It was like a magic trick, first one thing, then another completely different thing. Euplagia quadripunctaria apparently is quite rare, especially in GB.
I think I also got a Mountain Clouded Yellow on the same bush!