Chester itself, one of the last cities to fall, is called "a waste chester" as late as the days of Alfred ('A.-S. Chron.,' A. 894).
In the districts conquered after the Conversion of the English there was no such extermination, the vanquished Britons being fellow-Christians.
For the British survival in the Fenland see my 'History of Cambs.,' III., § 11.
Romano-British relics have been found in the Victoria Cave, Settle.