I start spending.

It always pays to shop around for supplies. Never accept the first price quoted. Don't deal with the do it yourself type chains as most are over priced and will never do you a discount. You probably won't find much choice either. It is surprising how much you can save simply by going to the right place. Always remember delivery can cost extra and someone is always buying cheaper than you.
For the gravel boards and posts I used Bentinck Fencing Kirkby in Ashfield.
There prices were very resonable and the stuff was delivered on time. 42 gravel boards 6x1 and 4 corner post 4 intermeadaites.
I ordered 2 ton bags of crushed lime stone and 10 bags of cement from a small place at Clown very reasonable price and again delivered on time. I will post the numbers for these places later.
Cost post and boards £380 aggregates £100.