Thanks for the reply David, the spoon is of a salt spoon length, 10.5cm, forgot to add before, the spoon is by George Smith and William Fearn, dating to 1799.
Just checked my catalogue and see that I have described a pair like this as salt shovels. They are also 10.5 cm long and are by Geo Smith, 1798. I see the bowl shape as transitional between the earlier proper shovel shape and the more usual bowl but perhaps that is to read too much into a design quirk.