A Bank of England One Pound note (Series C - green)(Chief Cashier - J S Fforde - serial N09E), uncirculated and in absolute mint condition could fetch anything up to £6 GBP. If it has been circulated but still in good condition, it might fetch anything up to £4 GBP.
A range of 8 consecutive uncirculated banknotes are likely to attract a higher value.
A reputable coin dealer will be able to give a more accurate valuation.
These notes are potentially still in circulation so, unless they are Uncirculated and in absolute mint condition, they are worth Ten Pounds. A Bank of England Ten Pound note (Series E - orange)(Chief Cashier Merlyn Lowther - serial BJ01), uncirculated and in absolute mint condition could fetch anything up to £20 GBP. A reputable coin dealer will be able to give a more accurate valuation.
A Bank of England One Pound note (Series A - blue)((K.O. Peppiatt - serial B82H), uncirculated and in absolute mint condition could fetch anything up to £25 GBP. If it has been circulated but still in good condition, it might fetch anything from £4 to £12 GBP. A reputable coin dealer will be able to give a more accurate valuation.
A Bank of England Fifty Pound note (Series E - red)(Chief Cashier G.E. A. Kentfield - serial E16), uncirculated and in absolute mint condition could fetch anything up to £95 GBP. Alternatively, they are still worth Fifty Pounds if you return it to the Bank of England.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 J. B. Page - serial A66J), uncirculated and in absolute mint condition could fetch anything up to £15 GBP. If it has been circulated but still in good condition, it might fetch anything up to £5 GBP. A reputable coin dealer will be able to give a more accurate valuation.
A Bank of England 1978 One Pound note (Series D - green)(Chief Cashier J.B. Page - serial A01), uncirculated and in absolute mint condition could fetch anything up to £15 GBP. If it has been circulated but still in good condition, it might fetch anything up to £6 GBP. There seems to be some unexplained significance to "low" serial numbers within the "A01" series of notes. The serial number of your note is nearly 1,000 lower than the quoted example in the catalogue. The value for "low" serial numbers is much higher. I suggest you take it to a reputable coin dealer for inspection and valuation.
A Bank of England white Five Pound note (Chief Cashier L.K. O'Brien)(serial A61A), uncirculated and in absolute mint condition could fetch anything up to £200 GBP. If it has been circulated but still in good condition, it might fetch anything from £60 to £140 GBP. A reputable coin dealer will be able to give a more accurate valuation.
A Bank of England One Pound note (Series C - green)(Chief Cashier J.Q. Hollom - serial A15Y), uncirculated and in absolute mint condition could fetch anything up to £12 GBP. If it has been circulated but still in good condition, it might fetch anything from £2 to £5 GBP. A reputable coin dealer will be able to give a more accurate valuation.
A Bank of England One Pound note (Series A - blue)(K.O. Peppiatt - serial W86H), uncirculated and in absolute mint condition could fetch anything up to £25 GBP. If it has been circulated but still in good condition, it might fetch anything from £4 to £12 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 J. B. Page - serial J57), uncirculated and in absolute mint condition could fetch anything from £5 up to £4 GBP. If it has been circulated but still in good condition, it might fetch up to £2 GBP. A reputable coin dealer will be able to give a more accurate valuation.
A Bank of England One Pound note (Series A - green)(Chief Cashier K.O. Peppiatt - serial D84B), uncirculated and in absolute mint condition could fetch anything up to £20 GBP. If it has been circulated but still in good condition, it might fetch anything from £5 to £10 GBP. A reputable coin dealer will be able to give a more accurate valuation.
A Bank of England One Pound note (Series C - green)((J. B. Page - serial CN to CZ), uncirculated and in absolute mint condition could fetch anything up to £6 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 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.