Hi,
yes, this is possible. You just have to follow these steps:
1. go to plugins settings page
2. select Basemap / custom base map 1 (or 2 or 3)
3. enter the following details:
– Tiles URL: http://{s}.ooc.openstreetmap.org/os1/{z}/{x}/{y}.jpg
– Attribution: © OpenStreetMap contributors, CC-BY-SA
– Minimum Zoom Level: 6
– Maximum Zoom Level: 17
– Support for subdomains?: yes
– Subdomain names: “a”, “b”, “c”
– Enable continuousWorld?: false
– Enable nowrap?: false
– Show errorTile-images if map could not be loaded?: true
4. change to Settings / Names for default basemaps
5. Change “Custom Basemap” (or Custom Basemap 2 or Custom Basemap 3) to “UK Map” or whatever you like
6. Save Settings.
Done
Afterwards you will see this basemap when creating a new marker or layer map.
best,
Robert
PS: as I give support for free, I´d appreciate your review at http://ww.wp.xz.cn/extend/plugins/leaflet-maps-marker/review