Have just spoken to JT - we receive this price as it is set from the LSE - however, our supplier had an outage before open this morning, which has affected some of these thinly traded smaller stocks, meaning the the Mid will not show until a trade is placed on it.
Spoken to Jonathan, and he has informed me that until the actual mid price changes and a new one is sent to us it will show as a zero I am afraid. Unfortunately it does not make a difference if there is a trade that has gone through - it will only change when the mid moves. Apologies for not making this clearer in my initial post.