Buys or Sells30 Sep 2018 19:14
You really can't use the figs shown on LSE to know which are which in terms of trades.
LSE use the Mid price to guess (YES GUESS) what the trades are
But all trades aren't taken that way.
You could have a Bid at 37 and an Ask at 40
That would put the Mid price at 38.5. (All as shown above)
But a Buy maybe made below the Mid and indeed a Sell made above the Mid.
To work out exactly you need to know where the trades are in accordance with what's being offered, not always to find out. Hence the mystery (fixing) or what ever you want to call it with AIM trading