Founded in 2008. The Landscape Juice Network (LJN) is the largest and fastest growing professional landscaping and horticultural association in the United Kingdom.
LJN's professional business forum is unrivalled and open to anyone within within the UK landscape industry
LJN's Business Objectives Group (BOG) is for any Pro serious about building their business.
For the researching visitor there's a wealth of landscaping ideas, garden design ideas, lawn advice tips and advice about garden maintenance.
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I always find this handy:
http://www.pavingexpert.com/calcall.htm
They have all you need to work out the footings, and there's another page on concrete mixes if you want to look at what mix to use.
Hope that helps a bit.