haystack, you are just protraying your clueless nature.
Look the trade was done via an RSP and not strictly via a market maker. Thats the whole point of being able to trade within the spread. RSPs' linked to market makers allow trades to be done within the spread. Hence your comment :
"The price obtained from a dummy trade has no bearing on the trade in question"
is total bollocks.
Doing a dummy trade gets you EXACTLY the price they would have got for the 100,000 trade at that time. If I was able to buy 100,000 at 9.67p at the time the 100,000 trade was done then why the heck do you think that 100,000 trade was a sell ? jeez man talk sense. You have a warped sense of logic.
Haystack, you are continually showing that you are clueless, keep digging.