As you can see they are doing some major work at the east end of the nave. And this is the amazing object...a reredos by Sir John Ninian Comper, designed and erected between the Wars as memorial to the men from Wymondham killed in action, a depiction of the Day of Judgement.
The Abbey itself is a magnificent building, but is, I guess, pretty unknown. It has a couple of spectacular medieval roofs, and all sorts of interesting fittings, like the Early Tudor monument (to the right of the reredos), made of terracotta. The lovely font cover was designed in the 1950s by (I think) Cecil Upcher.
Wymondham has some lovely old streets and also this Baroque town house (Gaius House)