British History Online provides a digital version of "A history of the County of Kent: volume 2", originally published in 1926. This volume deals with the religious houses of Kent, including accounts of the early history of Canterbury and Rochester cathedrals.

I came across this video (slightly dated) on the weekend where the London and Surrey 'Earth Mysteries' groups have a day trip around some of the Kentish prehistoric sites. Particularly of interest to me was the visit to Chestnuts. (I believe that site is currently inaccessible, being on private land.) The video prompted me to take my own little day trip to to find the Chiding Stone.

For a short period of time the Oxford Dictionary of Family Names has made its database available for free. "This huge, new dictionary is the ultimate reference work on family names of the UK, covering English, Scottish, Welsh, Irish, Cornish, and immigrant surnames. It includes every surname that currently has more than 100 bearers, and those that had more than 20 bearers in the 1881 census."

The National Archives are making digital records available on their website free of charge for as long as our Kew site is closed to visitors. Registered users will be able to order and download up to ten items at a time, to a maximum of 50 items over 30 days. The limits are there to try and help manage the demand for content and ensure the availability of our digital services for everyone.

In response to the challenges created by the global public health crisis of COVID-19, Project MUSE is pleased to support its participating publishers in making scholarly content temporarily available for free on our platform. With many higher education institutions moving into an exclusively online learning environment for the foreseeable future, we hope that easy access to vetted research in the humanities and social sciences, from a variety of distinguished university presses, societies, and related not-for-profit publishers, will help to support teaching, learning, and knowledge discovery for users worldwide.

The UK has rainfall records dating back 200 years or so, but the vast majority of these are in handwritten form and can't easily be used to analyse past periods of flooding and drought. The Rainfall Rescue Project is seeking volunteers to transfer all the data into online spreadsheets. You're not required to rummage through old bound volumes as the Met Office has already scanned the necessary documents - all 65,000 sheets.