Herring cake - ingredients

There seems to be great interest in the Herring cake, and while Christian and John spent hours making it unfortunately most of it was thrown out at the end of the night. First you cut the crusts off some good quality white bread. Arrange on a tray/dish. Start layering on a good deal of mayonaise. Layer up, adding prawns, bread, maynaise. Leave to settle and for the mayonaise to soak into the bread. Then add smoked salmon, gerkins, sliced raddish and caviar. It wasn't particularly appitising, to be honest.