See here for the film: https://www.youtube.com/watch?v=0Fd3kyyMunU.
Didcot is a town in Oxfordshire famous for its giant power station. It is not renowned for its artistic history. However in 2007 an amazing artefact was discovered a field near the town, a very old and rare mirror.
See here for related films and articles: http://hpanwo-tv.blogspot.co.uk/2013/09/roman-wall-reply-to-boudicca0-hpanwo.html.