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 Ten Shilling note (Series A - red/brown)(Chief Cashier L.K. O'Brien - serial number B15Y), uncirculated and in absolute mint condition could fetch anything up to £40 GBP. If it has been circulated but still in good condition, it might fetch anything from £10 to £18 GBP. A reputable coin dealer will be able to give a more accurate valuation.
A Bank of England 194? Ten Shilling note (Series A - red/brown)(Chief Cashier K.O. Peppiatt - serial J19D), uncirculated and in absolute mint condition could fetch anything up to £80 GBP. If it has been circulated but still in good condition, it might fetch anything from £30 to £65 GBP. A reputable coin dealer will be able to give a more accurate valuation.
A Bank of England Ten Shilling note (Series A - mauve - Wartime emergency issue)(Chief Cashier - K O Peppiatt), uncirculated and in absolute mint condition could fetch anything up to £65 GBP. If it has been circulated but still in good condition, it might fetch anything from £20 to £34 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 54X) 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 C - green)(Chief Cashier J.S. Fforde - serial S54L), 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 reputable coin dealer will be able to give a more accurate valuation.
A Bank of England Five Pound note (Series D - blue)(Chief Cashier J.B. Page - serial 84D), uncirculated and in absolute mint condition could fetch anything up to £30 GBP. If it has been circulated but still in good condition, it might fetch anything from £8 to £15 GBP. A reputable coin dealer will be able to give a more accurate valuation.
A Bank of England Ten Shilling note (Series C - red/brown)(Chief Cashier J.Q. Hollom - serial Z15), uncirculated and in absolute mint condition could fetch anything up to £16 GBP. If it has been circulated but still in good condition, it might fetch anything up to £8 GBP. A reputable coin dealer will be able to give a more accurate valuation.
A Bank of England Ten Shilling note (Series A - red/brown)(Chief Cashier K O Peppiatt - serial 08I), uncirculated and in absolute mint condition could fetch anything up to £170 GBP. If it has been circulated but still in good condition, it might fetch anything from £30 to £70 GBP. A reputable coin dealer will be able to give a more accurate valuation.
A Bank of England Ten Pound note (Series C - brown)(Chief Cashier J S Fforde - serial A65), uncirculated and in absolute mint condition could fetch anything up to £50 GBP. If it has been circulated but still in good condition, it might fetch anything up to £30 GBP. A reputable coin dealer will be able to give a more accurate valuation.
A Bank of England Five Pound note (Series D - blue)(Chief Cashier J.B. Page - serial 02N), uncirculated and in absolute mint condition could fetch anything from £5 up to £30 GBP. If it has been circulated but still in good condition, it might fetch anything from £8 to £15 GBP. A reputable coin dealer will be able to give a more accurate valuation.
A Bank of England One Pound note (Series C - green)(serial W50A - Chief Cashier J B Page), 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. Alternatively, they are worth £1 GBP if returned to the Bank of England. A reputable coin dealer will be able to give a more accurate valuation.
A Bank of England Five Pound note (Series D - blue - Chief Cashier J.B. Page)(Duke of Wellington)(serial number 88D), uncirculated and in absolute mint condition could fetch anything up to £30 GBP. If it has been circulated but still in good condition, it might fetch anything from £8 to £15 GBP. A consecutively numbered pair uncirculated and in absolute mint condition would appeal to a number of collectors and potentially get significantly more. A reputable coin dealer will be able to give a more accurate valuation.