Lots of good info here on Celtic buckets:https://balkancelts.wordpress.com/tag/marlborough-bucket/
Wiki mentions this in conjunction with the Marlborough bucket:
"Further evidence of human occupation comes from the discovery in St Margaret's Mead of the Marlborough Bucket, an Iron Age burial bucket made of fir wood with three iron hoops, a top bar and two handles; it also sports bronze bands decorated with human heads and mythical animals, and is now on display at the Wiltshire Museum in Devizes."
Some additional details from the Wiltshire Museum:
"Archaeology / Iron age
Accession number: DZSWS:STHEAD.387
Bucket / sepulchal bucket
1 large sepulchral bucket - the Marlborough Bucket - with restored wooden frame held with iron hoops, and two drop handles, the decoration consisting of three broad bands of thin bronze ornamented with grotesque animal forms and human faces and fastened to the (fir tree) wood by bronze headed iron nails, from an Iron Age Barrow within an Iron Age / Roman Cemetery at St Margaret's Mead, Marlborough.
Length 620 mm; width 620 mm; height 620 mm "