If you trade products on the London Stock Exchange on Saxo platforms, you will see the currency of the product shown as GBp (lower case p) or GBP. Examples:
It is common to assume that the currency for both is pound sterling. However, if the currency shows GBp it means the product is traded in pence. If the currency shows GBP the product is traded in pound sterling.
The High price 405.00 shown in the first screenshot means 405 pence which is 4.05 pounds.
Some products could also be traded in EUR or other currencies. Please check the currency accordingly.