diff --git a/leaflet-providers.js b/leaflet-providers.js
index 2e298ae2..83938112 100644
--- a/leaflet-providers.js
+++ b/leaflet-providers.js
@@ -976,20 +976,28 @@
 		},
 		NLS: {
 			// NLS maps are copyright National library of Scotland.
-			// http://maps.nls.uk/projects/api/index.html
+			// http://maps.nls.uk/projects/subscription-api
 			// Please contact NLS for anything other than non-commercial low volume usage
 			//
-			// Map sources: Ordnance Survey 1:1m to 1:63K, 1920s-1940s
+			// Map sources: Ordnance Survey 1:1m to 1:63K, 1880s-1961
 			//   z0-9  - 1:1m
 			//  z10-11 - quarter inch (1:253440)
 			//  z12-18 - one inch (1:63360)
-			url: 'https://nls-{s}.tileserver.com/nls/{z}/{x}/{y}.jpg',
+			url: 'https://api.maptiler.com/tiles/{variant}/{z}/{x}/{y}.jpg?key={apikey}',
 			options: {
-				attribution: '<a href="http://geo.nls.uk/maps/">National Library of Scotland Historic Maps</a>',
+				attribution: '<a href="http://maps.nls.uk/projects/subscription-api">National Library of Scotland Historic Maps</a>',
 				bounds: [[49.6, -12], [61.7, 3]],
 				minZoom: 1,
-				maxZoom: 18,
-				subdomains: '0123',
+				maxZoom: 18
+			},
+			variants: {
+				osgb63k1885: 'uk-osgb63k1885',
+				osgb1888: 'uk-osgb1888',
+				osgb10k1888: 'uk-osgb10k1888',
+				osgb1919: 'uk-osgb1919',
+				osgb25k1937: 'uk-osgb25k1937',
+				osgb63k1955: 'uk-osgb63k1955',
+				oslondon1k1893: 'uk-oslondon1k1893'
 			}
 		},
 		JusticeMap: {