Baby bird! 

Is it a house martin?
I scared the mum though I'm bad!pic.twitter.com/JMz7X1Exgf
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
I learned that barn swallows have flat(er) less v shaped tails? That's correct?
Barn swallows may be the only swallows I've seen in the UK. Graham's the expert on these things, rather than me.
I genuinely thought all swallows had that distinctive v. But maybe just Cypriot ones? 
compared to House Martins they have a deeper forked tail, no white rump and a red/blue throat. HM all white underneath
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.