Hi Miss Ribena
I am an Arch. Tech and does this sort of thing for a living. Your best bet is to measure the area accurately and drawing up a survey plan to scale. Then using greaseproof paper and graph paper you can optimise the design to suit. If you want to avoid cutting slabs you can stop just short of any walls, obstacles etc (to the nearest whole slab) and fill the remainig "gap" with nice round pebble or bigger round cobbles. You might be able to get this free from the beach (although maybe not advisable- could be illegal!) This not only breaks up the area and gives a bit of visual contrast/ interest but is good for drainage. You can buy 1 tonne dumpy bags of clean, washed pea gravel (choice of sizes, colours available) from good garden centres, quarries. Expect to pay about €100 or thereabouts, a tonne would go a long way in your case. Be sure to to lay "Terram" weed barrier beneath any paving/ gravel. Leave out slabs for planting, using bricks to create feature bands margins.....And finally buy Tommy'Walsh's book based on the Ground Force programme. It's full of tips, ideas and dodgey puns! I find it invaluable. It's published by the BBC and will pay for itself in no time. Most of all enjoy, the design is worth spending time on, think about aspect, orientation of the sun, where you will site your table, deck chair etc. Good luck.