This is the fourth time that we have spotted WGP on Bargain Hunt (for previous episodes with Fat Lava pottery see here, here and here). This latest episode was spotted when broadcast on the 20th March 2012 (it was originally aired on 24th June 2011). You can see the episode (Series 29, Episode 21) for a limited time of the BBC iPlayer(only available until the 27th of March 2012).
The episode was based in Peterborough. The contestants bought a West German vase, shown below, for £38.
Unfortunately at the auction sale interest was in more traditional antiques and the item struggled selling for just £18, making the team a £20 loss.
The vase was made by Bay, the same form with a different decor is shown below.