Solid Oak Doors
Lock Blocks are a very popular item sold at Heritage. The lock blocks are attached to the oak door slightly higher than the ledge, as seen in the image. The reasons for this 1) so the latch is higher if you feel the ledge is a little low, 2) it brings the latch out so you don't have to chip away into the architrave to fit the other side of the latch,
For more information call Heritage on 01142474917