The rocks and sand in the Valley of Kings are much lighter coloured than depicted in the series. The difference seen in the show is as a result of colour correction during the editing stage, because flat white backgrounds are visually dull.
Carter refers to Lord Carnarvon's daughter as Lady Evelyn Carnarvon. Whilst the title is Carnarvon the family name was Herbert. She was Lady Evelyn Herbert. Carter would have known of this.
This series shows Howard Carter and Evelyn Herbert, the daughter of Lord Carnarvon in a possible romantic relationship. This is actually incorrect and the estate of Lord Carnarvon had to issue a statement that contradicted this claim.