Welcome, lovely newbies! Pull up an upturned flowerpot comfortable deckchair and have a cup of tea/gin/fruit brandy as you choose!
QueenKong - That border would be lovely, but would work best in a sunny position (will it be sunny?) It would also have quite a short season - could you underplant with spring and autumn bulbs to extend it? If you want to stick with the purple theme, you could use crocus, muscari (latifolium is a good shade of purple), iris reticulata. And this is far from original, but I would put some lilies either in the border or in pots on the edge of the patio, so that you can enjoy the scent as you sit out there.
Teta - I wouldn't put out dahlias just yet. Can you start them off in pots in a coldframe?
Worzelswife - Have found my GW magazine. As far as my myopia permits, I think the photos are
p88: One of the lumpy outdoor cucumbers, multicoloured chilli and parsley (probably moss-curled).
p89 bottom: Cabbage. Flowers are calendula (pot marigold - possibly Art Shades) and the pink thing is, I think, an osteospermum (cape daisy). White antirrhinum (snapdragon) in the background. One lonely pelargonium (geranium) shoot poking through.
p90 (5): cabbage, black basil, nasturtiums, onion foliage, chive foliage, carrot foliage.
p90 (7): swiss chard (probably Bright Lights), red flower with dark leaves is perennial lobelia (possibly Queen Victoria), blue fluffy flower is ageratum.
Disclaimer: All identifications are provisional.