It's a tiny black shiny thing - shorter than a matchhead & ¼ the width
It hurts when it bites, & the bite later itches like mad & swells up, with a hard white inner ring & a much larger pink outer, which lasts for several days
First time I blew it away (because it looked like nothing) just as it bit
Second time I swiped at it with a gardening glove on & would like to think I squished it but fear I missed it
Any idea what it is? (I'm in Lancashire)