It's hard to imagine anyone but Sir Laurence Olivier providing the commentary for this frankly spectacular documentary that presents in glorious technicolour the epitome of pageantry and circumstance that was the Coronation of Elizabeth II. Bedecked in all of it's golden finery, Westminster Abbey provides a fitting - and reasonably well lit - setting for this astonishingly comprehensive coverage of a ceremony that had never before been covered for television. The narration is, as you might expect, suitably theatrical but it's never fawning. The use of poetry and history effortlessly and…