The David Austin roses are basically the ones that have the multiple groups of petals in the center, then a row of petals around those. They look really fluffy, and the photos that I was finding made it difficult to see how many rows of petals there were because they just have so much going on.
I found a few that looked like there were six groups of petals in the center part, so I decided to go with that. I also decided that to get a full look 8 petals in each group would probably be enough.
First, take six wires and hook the ends, then put a little sausage of gumpaste on the ends of the hooks. Roll out gumpaste to the thinnest setting on your pasta roller (mine were an 8 on the KA roller) and cut out 48 small rose petals.
Thin the edges of the petals with a ball tool so that they're a little ruffly.
Stack seven of the petals, using a tiny bit of water or gum glue on the base of the petals so that they stick together. You don't want the top of the petals to stick together.
When rose season starts up I'll need to get a real David Austin rose to take it apart and see what it really looks like. I think that the actual shape of these is more rounded on the back, but if you're putting them on a cake you don't want a super-round back since that will elevate the flower off of the cake a lot more than you probably want.
This flower took me 45 minutes to do, and it includes 102 petals. It's a full-sized flower, but if you wanted to use smaller cutters you could probably do fewer petals.
Kara Buntin owns A Cake To Remember LLC, online cake supplies at www.acaketoremember.com and www.acaketoremember.etsy.com