How many dormant volcanoes is in England?

England has many dormant volcanoes but the most notable ones to date are Whicham (Cumbria), Eycott Hill (Cumbria), Murton Pike (Cumbria), Dundry Hill (Somerset), Brent Knoll (Somerset), Pen y Fan (Powys), Cleeve Hill (Gloucestershire), May Hill (Gloucestershire), Sedbury Cliffs (Gloucestershire).