TheGenealogist announced the following on 25th December 2015:
TheGenealogist has now completed the launch of searchable Tithe Maps and Schedules for England and Wales with the release of more maps covering 40 new counties. These maps link to the searchable schedules which contain over 14 million records. The schedules contain detailed information on land use with linked maps that jump to the plot for an individual from the records. The maps can contain hundreds of individual plots with varying levels of detail. They can reveal buildings, fields, houses, rivers, lakes, woods and cities.
They have just announced (2017) that they have digitised the maps for Northumberland (and many other counties).
Web site address is: https://www.thegenealogist.co.uk/
The society has a subscription and the records can be examined on the public computers at the Research Centre at Percy House.