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The Maplin ones are rubbish for the money compared to the (identically priced) Cambridge Audio ones. The Maplin ones have too much plastic, as Chris says the CA ones are all metal and all gold-plated.
My approach with speaker wire is not to buy the cheapest but to buy the cheapest What Hi-Fi recommended, so for the kitchen hi-fi I've just put in that was Audioquest FLX-SLiP 14/4 at £5 a metre. I don't think there's much point spending more than that.
banana plugs - the maplin gold plated ones are ok