The Jaguar AJ6 engine is one of the strongest of any car: it will generally shrug off a loss of coolant in this way without damage. I know of several cars which have suffered in this way. None of them blew a head gasket or suffered other damage, despite more than one loss of coolant at speed in the fast lane of a motorway!
I drove mine 10 miles with barely any coolant, just flushing few litres every 2 miles. No damage, temp didn't even get to red but it is winter so this probably helped a bit. It is super strong engine indeed