"... tuning signals, test cards and captions"
Sad? Of course. But at least this features some historical facts and figures rather than just a bunch of photos of painted, phallic driftwood like the Greenwood Art Museum!
Re-live the gold age of British Television, when there wasn't much of it, particularly at night and in the morning.
Half-fill a brandy glass with water and rub the rim as you stare at the picture above. Hme... perhaps I should reword that?