yep, just call in or ring them, they will let you know when they have a batch... (we used 2 colours, grey and a purply colour) with regard to laying them, we had a stone driveway all round our house, we just cleared a section outside the patio doo, still leaving some stone as a foundation. we sloped it slightly down towards the lawn, so that the water would not lie on it when it rains... hubby used wooden lats to see the lie of the ground, then boxed the section off we wanted with lats, filled it with sand, hired a whacker / compactor to level the sand, then literally decided on the pattern we wanted and away we went, the sand was wet and we sprinkled dry concrete on top as we went along before laying the bricks, when all the bricks were down, (i cant remember if we went over the top with the whacker again) we poured fine sand generously all over the top, and brushed it into it, left it for a week or so, then brushed it off.... simple as... took us an evening to lay the bricks, our patio area is about 9m by 5m..
we subsequently concreted around the patio, as we inteded to put up a balustrade around them.... which has not materialised yet lol...