Lord Melbourne's death is shown as happening before the birth of Victoria's first son, Albert Edward, the future Edward VII. He was born in 1841. Lord Melbourne died in 1848.
By then, Victoria and Albert had six children. But the
series shows only the two oldest, Victoria, called "Vicky", and Albert, nicknamed "Bertie".
Albert learns that Leopold intends to marry Ernst to Princess Isabella of Spain. It was, in fact, Isabella's mother who considered Ernst as a possible husband for her daughter.