[I am Richard Brandon]

"Well, that metal detector should come forward and claim the recognition that it rightfully deserves. "

I cannot believe that you failed to correct 'whose identity' to 'that's identity'. Fie upon you Sir!

[Mr Ramsbotham]

I cannot believe that you failed to correct 'whose identity' to 'that's identity'. Fie upon you Sir!

I believe "whose" is correct. I don't think there's a possessive form of "that." It's the sentence construction that gives the hilarious result.