Search using a current placename (eg. towns, farms, streets) from Nominatim / OpenStreetMap, as well as the Definitive Gazetteer for Scotland
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Search using a National Grid Reference in various forms:
"NT27", "NT 263 721", "NT263721", "NT2637572134", "326375,672134",
or latitude,longitude: "52.456,-2.123",
or Postcode "EH", "EH9", "EH9 1", "EH9 1SL", "EH91SL"
Search an historic name from the GB1900 gazetteer of names on the OS six-inch 1888-1913 maps
Search using Trench Map Coordinates, eg.
28.I.8
36C.S.22.c
62d.J.19.b.4.3