hi all, thanks for the replys.
i returned to the client site yesterday to troubleshoot this further.
Upon arriving i setup my tablet to connect and started running packet captures, only to find it was working fine......
Couldnt' fault it and as far as i know nothing has changed.
Guess i'll just put this down to HP controlller having a bad day (as they so often do).
Thankyou all for your helpful replies.