CAPACETE "TOMMY" BRODIE MKI
BRODIE MARK I TOMMY HELMET
The latest aquisition to my collection is a Brodie helmet, called Helmet, steel, Mark I helmet in Britain and the M1917 Helmet in the U.S., was a steel combat helmet designed and patented in 1915 by the Briton John Leopold Brodie. Colloquially, it was also called the shrapnel helmet, Tommy helmet, or Tin Hat.
This one is a FAP example. The FAP stands for First Aid Post, and was used during the "Blitz".