No pictures but I remember the scene. Anthea is dressed in a short yellowish dress (might have been a playsuit) and black tights, and is tricked by Noel's crew into taking part in what she thinks is a programme about wacky traditional English village games - the last of which is custard-filled-welly racing. She is provided with custard filled wellies into which she steps and then runs across the studio in a race with I think a guy also in custard filled wellies.
As I don't like tights the scene was a miss for me so I didn't keep it when it aired, and like all TV-clips it's nothing like as good as what a wam producer could create. Was fun to see the expression on Anthea's face when she realised she'd been gotcha'd though - I think she tried to throw one of the custard wellies at Noel!
Unfortunately that particular episode is one the missing ones in andy permans collection who is uploading them on youtube. Funnily enough the episode where she got gunged is also missing frlm hks collection though least that is available elsewhere.