You need to provide more context! "15.10" could refer to:

* 15.10 pounds (lbs): This is already in pounds, so the answer is simply 15.10 pounds.

* 15.10 of another currency: To convert this to pounds, you'd need to specify the currency (e.g., 15.10 Euros, 15.10 US Dollars, etc.). Then, you'd use a currency converter to find the equivalent amount in pounds.

Please provide more information so I can help you with the conversion!