Thanks Arnold. 
silver_si, thanks for your suggestion, gave it a go, the clicking seemed to be coming from the speedo (i thought somewhere behind) so i demolished the dashboard and unplugged the speedo and the 'clicking' stopped! None of the relay boxes I found make any noises at all. Is this something peculiar to micras where the clicking noise of your indicators comes from where the bulbs are? Bit of a head scratcher this one.... (BTW, what does the blue and grey box above the fuse box do if not the indicator relay?)
If a bit of extra info helps, the problem is the indicators are intermittent. They work for a bit, then go off, then after a while come back on. Sometimes sitting at a junction they will be on then go off after several flashes. Thought it could be the relay (but can't seem to find it) or maybe the stalk? Not sure, anyone got any other ideas about the whereabouts of the relay or what might be causing this problem? Thanks.
