I decided to do a simple one layer card and used a mask to create the white border of the stamp.
This could be done by hand with a pair of scissors and a craft knife, but it's a fiddly job so I used my trusty Cameo. I scanned an image of the stamp into the Design Studio and was then able to create my own mask.
With that in place I was able to create my scene using my brayer and Ink Dusters.
This set has the postmark and Queen's head to go with it. I embossed Her Majesty's head with gold embossing powder to give it an authentic look (the embossing shows up better in the first photo).
Not long after I'd made this card I had a birthday card to make, so I decided to do a birthday version. I think the first card looks more washed out in the photo than it did in real life, but I do prefer the second version.
I went more vibrant with the colours and I think it looks better, especially in the photo.
I used my Cameo's Design Studio to create a birthday version of the postmark and set it to print, rather than cut. I was then able to build the scene around it. Hopefully Clarity will bring out some more postmarks themselves, a Christmas and a Birthday one would be fab.
I noticed the other day that when the cards are put on the Clarity website they list the stamps that are used to make them. I thought it might be useful to add the link to that page here. That way if you want details of any of the stamps you will know where to find them.