Though I had to look it up (left side of the pond and all that) the source for this is only a few years ago. I can't imagine that there would be no recollections.
A quick search shows Harry Biscuit as a character in a radio comedy Bleak Expectations, based on Charles Dickens Bleak House and Great Expectations. Cannot tell you any more than that as I have never heard of it before. Wikipedia does mention that its humor is along the lines of The Goon Show which I am familiar with. Now if they have anything like Blue Bottle then I would be interested in listening to it.
i looked up and apparently harry biscuit is a hero who help two kids to flee a boarding school. maybe?.