I've never been to Murray's before today so I don't know if this is a new thing, them having a sandwich press ... my original mission was to buy a few stiltons. This was at lunch time and I noticed some people getting sandwiches pressed. They have a few different pre-made sandiches on focaccia, which they will press on request.
It was wonderful. I can't remember all the ingredients but it definitely had mortadella, mozarella, tomatoes, and some greens (arugula?). All for a very reasonable $5.95.
Oh and the stiltons look gorgeous by the way.