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For those who can catch it, Margaret Calvert is to be on BBC2 "Top Gear" on Sunday at 20:00 GMT
From the programme web page
James May drives the new Vauxhall Insignia VXR, accompanied by Margaret Calvert, the designer of Britain's road signs.
Being Top Gear, I doubt it will be particularly highbrow, but at least she is appearing with the sensible one.