Re #25385 above.
I grew up in Blyth, North East England about 10 miles up the coast from Newcastle.
I never head of any UXB activity, I'm guessing all were sorted soon after the raids.
Newcastle was the target of a few raids, but not as heavily bombed as some cities:
https://en.wikipedia.org/wiki/Newcastle_Blitz
My parents where children then and don't recall any sustained bombing, but the Luftwaffe did seem keen on "Aerial Mines" or parachute bombs as they called them.
These single raiders went on for quite a while till near the end of the war.
When I was growing up the beach still had tank traps on it. 8' cubes of concrete scattered all over the sand-dunes. Of course it was obvious to small boys that you dug under them to make them roll over...Darwinism hadn't reached the North then.
Recently the Naval Gun Battery has been restored. It protected Blyth Harbour and beaches:
https://www.blythbattery.org.uk/
The gun type originally installed
https://en.wikipedia.org/wiki/BL_6-inch_Mk_VII_naval_gun
N.