Yes you just need to register on site with the National Archives and you get a card valid for a year - or that was the case last time I was there. Then you can marvel at the fact that all our national treasures are stored directly under the Heathrow flightpath and hope no aircraft ever come down and incinerate the whole collection.
On this registration don't forget that the pictures are often a representative sample of a wider tableware set which may run to 30-40 different shapes. Of this particular one, I have also seen the creamer, a celery and a tankard.