I can give you some US prices, not sure how they compare to the UK but I just finished rebuilding a completely wrecked M coupe. Used hood 700-900, new bumper cover, 425, used bumper 150, used radiator support 100-150, new radiator 140, new kidney grills 80, new aftermarket lights 200-500 depending on what you like. Also up there is the AC fan and power steering cooler. Paint is whatever the going rate is there for you. It looks like your bumper cover is usable but you are better off with an undamaged hood. That will take too much time and bondo and you will still be unhappy with the results.
Not knowing the history of the car, while it is going to be that far apart, you should consider a new water pump, thermostat, belts etc. It is much needed around 100,000 km and would be a piece of cake while you had everything else apart.
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