Tottenham cake does exist, Sainsbury's, some Greggs, etc most good cake shops sell them.
History of the cake, a geezer named Henry Chalkity, he was a Quaker or Friend, lived in the N London Quaker/Friend community, he invented/cooked/sold the first Tottenham Cake in 1901, whole cake for 1penny or smaller misshaped for 1/2penny.
Its original, 1901, top colour was Pink, still is, this was because of the mulberries used, that were found growing in the Quaker/Friend, burial grounds.
The cake is a square shaped sponge, with pink raspberry coconut icing.
I have a recipe so might give it a go and make some, lol!