What do you call this little pot please?

looks like a sugar bowl without the lid, but is only as big as an egg cup (cook & serve. What is it called. or what is it for?)

I have one exactly the same shape except in Autumn Splendour pattern no lid with mine but I suspect they did have one .
Could it have been to set a classic egg custard in the oven in cordon bleu cookery called a Creme Caramel generally finished with a gas flame hence the oven to table
quality pottery.

Hi, it is a mustard pot and would have had a lid with a small hole on the edge to accommodate a mustard spoon. It used to be quite common to have freshly mixed mustard as part of the condiments. Cheers, marl

Hahaa Marl beat me to it .... I was going to play a guessing game ...
There was no need for the mustard pot to be 'ovenproof' really as it would never have been put into the oven.

sorry about that Ev!