The blood condition appeared in the royal line with the birth of Victoria’s son, but the hereditary condition was absent in the family before this.

However, there is no evidence that the condition runs in the Rothschild family.

Then, a rumour about Natty, Leopold’s son and Nathan’s grandson, arose, claiming that he actually fathered Queen Victoria’s children, as Albert was unable to.

During her reign, Victoria made Nathan’s sons Antony and Lionel baronet and baron respectively.

The family made history again when Lionel Rothschild was elected to the House of Commons, before his son Nathan (Natty) became the first ever Jewish peer.

Besides royal and aristocratic customers, the firm has always funded governments and been close to key political players.

Their links with the rulers of Europe in the modern age include George Pompidou, Prime Minister and President of France, who was a manager at Rothschilds, as were many politicians in Margaret Thatcher’s government of the 1980's.