The Accident Exchange Group - An ACE Investment

Pilotman - apart from delayed trades as already mentioned, it is not uncommon for trades in several stocks to be done somewhere away from the official London/AIM exchange. Such as on the Virt-x exchange. Those trades don't get added into the LSE ones and don't get picked up by advfn, Sharescope, or other financial sites (they can be found within trade listings on the Virt-x site itself, but tracking them down is a chore). See thread

Edit: Having said which - today's visible volume looks like being its highest in a fortnight.