Undated handout picture from the bakers of Hovis, who are celebrating their 120th anniversary this year, and have summed up the history of the past twelve decades in a twelve decker sandwich. PRESS ASSOCIATION Photo. Picture issue date: tuesday May 9, 2006. The sandwich will be on display at The Hovis Exhibition which is being hosted at the United Grand Lodge, London. Devised by Hovis master baker Colin Lomax and consumer historian Robert Opie, each layer, be it dainty and delicate or deep filled and decadent, features Hovis Original Wheatgerm bread and a popular filling of the era. See PA story CONSUMER Sandwich. Photo credit should read: Borkowski / PA.