An update from Claire Heron from her talk on 

Watersheds and Holy Wells : 

Connecting with the Waters of Lune and Eden

Resources for Researching / Finding Holy Wells

National Library of Scotland (for old OS maps and Lidar)
https://maps.nls.uk/geo/find/#zoom=5.0&lat=56.00000&lon=-4.00000&layers=102&b=1&z=1&point=0,0

Claire's Google Map of Cumbrian (and a few more) Wells.
This is a work in progreess and incomplete
https://www.google.com/maps/d/edit?mid=1ipDvlN2I9RNOY7mCS-PEemHnuOs&usp=sharing

Claire's Google Map of Elen and Belinus in Cumbria. It is also a recnt work in progress, far from complete, but I'm getting there! Elen is purple, Belinus is yellow. Wells/springs have a kind of fountain on the marker.
https://www.google.com/maps/d/edit?mid=1mfoTobrVKgtjlA5F-y5ZEy0kc1bXLh6o&usp=sharing

Andy Norfolk has created google maps of all the named springs in each county of the UK. They have been collated here by Ross Parish on his holy wells website (another great resource!)
https://insearchofholywellsandhealingsprings.wordpress.com/ancient-and-holy-wells-maps-by-andy-norfolk/

Books:

Hope's Legendary Law of the Holy Wells of England online - Cumberland chapter
https://www.antipope.org/feorag/wells/hope/cumberland.html?fbclid=IwZXh0bgNhZW0CMTEAAR0wYw-wS_-MviYRw4aKmCeUiWsrDGiyNlz54Dwhl7JJNsCo-GoU3pFyr28_aem_r3T1fcQg73tCmEt4ikCa-Q

Gill Edwards' Holy Wells of Cumbria booklet is still available here I think
https://www.livingmagically.co.uk/cumbriaholywells.htm?fbclid=IwZXh0bgNhZW0CMTEAAR1bc2TJGu_zv0yYbv0R5eSrOoA_PTmYEBapkn0KJu9kstlzdZf5oyStDbY_aem_PtYWUcRlgJQbU3q00wn5VQ

Springs of Living Waters by Fr John Musther
https://www.blurb.co.uk/b/6519658-springs-of-living-waters?fbclid=IwZXh0bgNhZW0CMTEAAR1S77vm2VQQBixHxux4ld1LmFKP_5M2SmBT8zzBvs1MjM0tm247FJKkgvQ_aem_lRbkHp5TNB7dTgNzfQ2jUg

Jim Taylor Page's Cumbrian Holy Wells
This is a very useful gazetteer. Taylor Page was a dowser as well as a researcher. The booklet is very hard to find, sometimes appears on ebay.
https://www.amazon.co.uk/Cumbrian-Holy-Wells-History-Ancient/dp/0951461524?fbclid=IwZXh0bgNhZW0CMTEAAR0cwcbVPxGR9sWQB-d2PtPx2EbHdzVpEH55tUvQ3XDNJVdS7vpQBX9gDvo_aem_MecQVp17-kZHTwkNHQMUCA

Facebook Groups

Holy Wells, Healing Wells and Sacred Springs of Britain.
https://www.facebook.com/groups/244060782427611

Holy and Historic Wells of Cumbria
https://www.facebook.com/groups/1131351716891249