I found this old (2010) DVD in our library. It is one of the best things I've watched all year. Emma Thompson and Alan Rickman at the top of their game in a brief (45-minute) sketch designed to fill a slot on BBC TV in recognition of National Poetry Month. Visually, it's full of tight shots that make you feel like you are watching the two actors on a London stage from a front-row seat. The ending is a bit "odd" IMHO, but the best aspect is the minimal dialogue with an extended voice-over reminiscent of the writing of T. S. Eliot.
Addendum: streaming now on Amazon Prime.