I dread to think the cost had I not got a great deal on most of it.
Governors 1,2 & 3 were £150 for example and I got cut prices on plenty of them.
Not sure of the total, had some cash, spent some more cash, put the rest on the Debit Card but somewhere around £850, with about £400 going up in the final few minutes of the display (Everything & including to the right of Crown Jewels).
Guy Fawkes, pah
Edit: Advice to any of you buying fireworks... Please come over to the UKFR forum for advice and to find out your nearest proper shop (many forum sponsers all over the country). Supermarket fireworks are overpriced tat, with even the larger items full of air, clay and tubes with nothing in them. On the left side of my stash the x2 Sunset cakes are £18, Minefield £15, Heavy Duty £20 (Excellent and over a minute long), Ball Head 3" Shell rockets about a tenner each and the pack of stunning War Hawk rockets (x6) for only £15.
There is some excellent Pyro out there at very reasonable prices. On the other hand you have a Crown Jewel which is right at the consumer limit as a 10Kg lump of awesome at around £70-£90 each!