A Bank of England One Pound note (Series D - green)(Chief Cashier D.H.F. Somerset - depending on the serial number), uncirculated and in absolute mint condition could fetch anything up to £5 GBP. If it has been circulated but still in good condition, it might fetch anything up to £3 GBP.
A reputable coin dealer will be able to give a more accurate valuation.
A Bank of England One Pound note (Series D - green - Sir Isaac Newton)(Chief Cashier D.H.F. Somerset - serial BW25), uncirculated and in absolute mint condition could fetch anything up to £5 GBP. If it has been circulated but still in good condition, it might fetch anything up to £3 GBP. A reputable coin dealer will be able to give a more accurate valuation.
A Bank of England One Pound note (Series D - green)(Chief Cashier D H F Somerset - serial CS75), uncirculated and in absolute mint condition could fetch anything up to £4 GBP. If it has been circulated but still in good condition, it might fetch anything up to £2 GBP. A reputable coin dealer will be able to give a more accurate valuation.
You have omitted the first 3 or 4 characters of the serial number and not provided the name of the Chief Cashier. Modern Bank of England One Pound notes were issued from 1928 to 1984. Please narrow down the possibilities a lot.
A Bank of England One Pound note (Series D - green)(Chief Cashier D.H.F. Somerset - serial CW65), uncirculated and in absolute mint condition could fetch anything up to £4 GBP. If it has been circulated but still in good condition, it might fetch anything from up to £2 GBP. A reputable coin dealer will be able to give a more accurate valuation.
A Bank of England 1984 Ten Pound note (Series D - mainly brown)(Chief Cashier D.H.F. Somerset - depending on the serial number), uncirculated and in absolute mint condition could fetch anything up to £35 GBP. If it has been circulated but still in good condition, it might fetch anything up to £18 GBP. A reputable coin dealer will be able to give a more accurate valuation.
The Bank of England issued the last One Pound note in 1984, then withdrew and demonetised the One Pound note in 1988, after it was replaced by the One Pound coin in 1983. A Bank of England 1971 One Pound note (Series D - green)(Chief Cashier - D.H.F. Somerset - depending on the serial number), uncirculated and in absolute mint condition could fetch anything from up to £5 GBP. If it has been circulated but still in good condition, it might fetch anything up to £3 GBP. Consecutively numbered uncirculated notes may attract a higher price. A reputable coin dealer will be able to give a more accurate valuation.
You have not provided a serial number or a place of issue, but you potentially have a note of value.
A pound is always worth exactly 1 pound in England.
In mid-2002, the Bank of England withdrew a batch of Five Pound notes due to the ink on the serial numbers smudging and being able to be rubbed off.
A British 198? One Pound note (Series D - green)(Chief Cashier D.H.F. Somerset - serial DW06), uncirculated and in absolute mint condition could fetch anything up to £5 GBP. If it has been circulated but still in good condition, it might fetch anything up to £3 GBP. A reputable coin dealer will be able to give a more accurate valuation.
The currency unit in England is the Pound Sterling The currency unit in England is the Pound Sterling
Selling England by the Pound was created in 1973-08.