After coming out of his first visit to the cold chamber Prince Harry was asked how he had found the conditions, "cold" he said. Joking with the waiting press pack, he added: "it's your turn next."
Over a 20-hour stay the prince joined the Walking With The Wounded team as they prepare for their South Pole trek.
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The German bomb - a 500kg device - was spotted by a barge carrying out dredging works, the Royal Navy said.
The study found children born in the 1980s have found it much harder to build up wealth in housing and pensions as they age.
The singer ended speculation over who would perform by saying "the rumors are true" to her 63 million Twitter followers on Friday morning.