Mention the series code of countries using pound sterling as their currency unit. Which country belongs to high income group among them.
SELECT DISTINCT T1.CountryCode, T1.CurrencyUnit, T1.IncomeGroup FROM Country AS T1 INNER JOIN CountryNotes AS T2 ON T1.CountryCode = T2.Countrycode WHERE T1.CurrencyUnit = 'Pound sterling' AND T1.IncomeGroup LIKE '%high income%'