When was the first custard cream biscuit made?

Is it older than the bourbon?When was the first custard cream biscuit made?
It was before 1955 because I used to buy them on my way to work then, but they didn't come in packets. Shops scooped them out of biscuit tins and weighed out however much you wanted.When was the first custard cream biscuit made?
1888
you really have nothing to do..............
100 years BG ( before Gromit )
duh! i think everyone knows it was after the indians got him!