As a perfect comparison, Red-eyed Damselfly were also present, here's an obliging male
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Small Red-eyed Damselfly were as the name implies VERY small and the abdomen is significantly narrowed and slightly tapered. The most obvious feature, apart from size is the blue side to segment 8 (black in Red-eyed)
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Another one for the list then and it's only a matter of time before these are found in Shropshire. First discovered in Essex as recently as 1999, their rapid spread throughout the UK has been simply phenomenal as they have spread both North and West since. Hmm, I'm driving down the M5 next Friday, if the weather is OK I might just stop again and try to get some decent images - with the light behind me!